By "new vibrolux", I assume you mean the 70's style amps that just came out. They are not reissues and are more of a vintage modified product. I've compared a blackface Princeton Reverb, the original 70's model and the newest model with the 1968 cosmetics. They all sound different. In fact, I've lined up 3 1965 Deluxe Reverb amps and they all had different sounds. I have a hard time doing comparisons.
 
As for Celestion speakers, well I love them in Fender amps. Have a look in the back of Keith Richards tweed Twins and you'll see they are all loaded with Celestions. As Tom points out, the transformers on the new stuff are pretty wimpy compared to the older models and do affect the sound.

Nothing beats the tone of old tube amps. I've had a bunch through the years.... I had one, I don't recall the brand..., I gave $100 bucks for it. It had a big rectifier tube in it that I replaced with a bridge rectifier. And the vibrato/tremolo was contained in a covered box inside the amp.... a neon lamp with a variable slow speed oscillator circuit, and a light sensitive tube to make it work....... to  the monsters like Ampeg with 6L6's and heavy transformers.... you needed to bring your pet gorilla to the gig or buy the crew a few beers to load that baby in and out. The one I had was rated at 100w with a pair of 12's in a combo. I picked up a Carvin VT-112 with 50w that blew the Ampeg away so I sold the Ampeg.
 
The Carvin VT-112 had EL-84's in it.... 4 of them.   That baby was a hybrid. Chips on the front end and tubes on the output. Sounded good though.  I carried spare chips because it had a tendency to blow the chips out. I think I still have a new chip in my guitar case, but the amp is long gone. 
 
After some time, I bought another Carvin.... this one was the 100w combo with a single 12" EVM speaker.... that baby was LOUD.  I believe it was the VTX-100 with 4 EL-34's  and sold the 50w Carvin some time later. 
 
After a time, realizing the 100w Carvin was way too much power for most country gigs, even flipped back to 50w half power...... I sold it and bought a Mesa Boogie Studio 22..... that sweet little baby runs 22 watts out of a pair of EL-84 tubes (AKA 6BQ5).   Love, Love, Love this amp. It gets the tone... both clean and singing, provides plenty of volume for just about any gig, and can be carried easily.   I bought it new for $450 and have been offered many times that amount.  It's doubtful I will get rid of it. I played it in a house band where the amp was set on a 4x12 cabinet behind me. I ran an extension speaker cab with a single 15" Jensen speaker tilted back on the floor at my feet. Talk about a nice way to grab some feedback and ride that wave..... wow....!!!  I sent the output from the Mesa into the two channels of a DCA-800 Carvin power amp, and each channel supplied it's own Lab Series 4x12 cabinet. One on each side of the stage. The DCA had "volume" controls.... they called them attenuators, so both the other guitar play and myself could control the volume of our respective 4x12 cabinets individually. Turn it up until you could hear or got the right fill and that was one.....sweet.....rig.  Tone from the Boogie, volume as needed from the DCA/speakers.
 
I was also taking a course in electronics repair during the "early years" and got a copy of a Marshall 50w schematic, bought the transformers from a music store, picked up the parts and cobbled together a workable amp. I think I bought some KT-88's for it just for grins ..(I'd have to look to be sure... I still have them and the transformers in my shop somewhere) ...and made that thing work for a time. I eventually took it apart when I got a good amp.... it was dangerous. All the wiring was exposed, including the 450vdc plate voltage.  I rebuilt it a decade or so later for grins, and managed to release the magic smoke that makes the amps work.... it stopped working in a dramatic way. I had something connected wrong or the grid bias was off a wee tad too far in the wrong direction.
 
The modeling amps are cool and very versatile. I had a Vox AD-30 that I used at church, I never knew what I was going to be playing from one week to the next so that amp did fine. It sported a 12AX7 preamp tube in the front end and power section was solid state. Might have been FETs. Not sure. It sounded good but never matched the Mesa's tone.  I sold it when I left the church band.
 
I'll always appreciate the tone of a clipped tube section.

"All the wiring was exposed, including the 450vdc plate voltage."
YIKES!

That's livin on the edge....

I dumped the stored charge ONCE. It was in that 450ish range.
Fortunately the rig was in "standby" and the caps were disconnected from the rectifier.
All I got was a "jolt"; it certainly reminded me NOT to be careless!
I now have a good idea how "shock" treatment works.
 
T

If you work on gear long enough, it's only a matter of time until you get lit up. I put safety first and try to be as careful as I can, but it only takes a small slip or moment of distraction and WHAM! Glad I don't work on chainsaw's.

It really depends on the genre of music, I believe.  I for one turn to Fender amps over everything else.  No other amp has such clean and bright sound.  My favorite, among many, is a '65 Reverb Deluxe.  I always go tube over SS which does make a difference in sound (to me) when it goes to Fender amps.
 
Yet, there is another amp I am enamored with lately.  That is the Hughes & Kettners.  These amps just seem to cut through so nicely with no detectable noise, super clean.
 
Of course these amps are above $300, but this is my current take on amps.
 
Kind regards,
 
Living Room Rocker

Here's my version of an AC15 inspired amp. Not as pretty as Karyn's, but it delivers the goods.
 

Here's the innards,
 

 

And the finished product.