Mentioned this in another thread...
Just recently picked up a Neve Portico II channel-strip.
It's somewhat costly, but the mic preamp, 4-band EQ, and compressor are all world-class.
The Portico II mic pre alone makes a HUGE difference.
When auditioning various mics, it felt like I had upgraded my entire mic collection.
Mics that sounded a bit strident with mediocre preamps suddenly sounded very focused.
ie: The Miktec CV4 connected to my Fireface UFX's onboard preamps sounds ok... but not overwhelmingly good.
There's a hollow character that I don't particularly like.
Connected to the Portico-II, the CV4 sounds super focused and well balanced. It's a night vs. day difference.
I'm having major G.A.S. for a second (for stereo recording and post processing).
Might have to sell a kidney...