Teal
...the plugs sounding "dated"...

 
"Sounding dated" is probably a bad choice of words anyway. Plugins that emulate old vintage hardware would hopefully sound dated and that would be a good thing.
 

I don't think of the Sonitus effects as sounding dated. I think of them as overachieving stompboxes.

I've already reached my expiry date ;)

The effects in X Pro are ... well .... professional.  The prochannel effects are about as good as any 3rd party effects.  Not better for everything, not worse.  There are plenty of threads if you'll research.  The SSL buss comp (comes w/ Pro) works as well as any buss comp.  The LA2A-style (separate) is great, too.  I can't tell much difference between Cake's 1176 Fet and the Softube FET, which is a well respected emulation.  And a lot of the other effects are 3rd party - Sonitus, Blue Tube, Breeverb, Voxengo's convolution reverb, etc.  So of course they sound as good as 3rd party plugs - they are.  They are good enough that they aren't going to keep you from creating your masterpiece.  Now if you want to spend $1000 on 3rd party plugs go ahead.  You can probably convince yourself they are better, even if you can't hear the difference in a blind shootout.  Might make you feel better, or longer, whatever.
 
If you already have a bunch of plugs you like, get the cheaper versions.  Mostly they are the same except for the plug-in count.  The prochannel (starts w/ the $200 version) is a wonderful, ergonomic tool built into the Inspector strip.  One of the best things Cake has done for workflow, esp. w/ the flyout EQ.  I have a buttload of 3rd party effects but find myself coming back to the PC since it is easy and quick.  Whatever I could possibly gain sonically in choosing a different digital effect is made up for in just getting on w/ the job.  I'd rather spend time mucking around w/ the analog front end of things - much better sound quality divided by time effectiveness.
 
 
@
 

Teal
Samplitude has had excellent multiband mastering compression, the AM-suite analog modeling plugs, and Pro-X has the restoration suite.  Samp is still probably in the lead in bundled FX, but equivalents are so inexpensive these days, no one is going to switch to Samp just for the plugs.

I have been a Magix user for years  and I can tell you that if you need to go deep cleaning / restoration the most cost effective way to go  there is by picking up The Magix Audio Cleaning Lab Premium 2014 ...
you get the spectral cleaning , the compressors , restoration tools ,  vst  dxi support and a bunch of the AM plugs ….
(the plugs are just about all of the plugs you would get in Samplitude & a lot of them are the same  )
then if you want everything else , and if you are so inclined , you can download Samplitude Pro X Silver Free ...
that will give you up to 12 tracks of unrestricted Samplitude with all the other plugs …
(the reverb and a few other plugs run as demo ) … in any event as a lite version of Samp it smokes ….
 
thats what I did 
 
 
Kenny