+1 on the RME Babyface Pro.
My mics aren't up there with Schoeps, only 414s and Sennheiser 441s but the sound through the Babyface pres is fantastic.
FWIW, RME's original was called just Babyface.
A couple years back it was upgraded, and is now called Babyface Pro.
I just mention this because you can probably find the old one much cheaper used if you want to affordably step up to RME's stable converters and drivers.
It comes bundled with clever mixing/routing software (TotalMix FX) that, let's just say, does things differently.
It was not intuitive for me.
Fortunately RME has a Youtube channel with training vids.
Here's RME's introduction to the Babyface Pro:
https://www.youtube.com/watch?v=-o4F8kb95PU&t=10s
Here's RME's introduction to TotalMix FX:
https://www.youtube.com/watch?v=Zkxz...k&index=2&t=0s