I have three Pre Amps
A Groovetubes Vipre
A HHB Classic 60
And a Focusrite ISA220 solid state
All are different and all do certain things and sound very well.
I have had the HHB almost forever.
The Focusrite about from when they came out. (This is hard to start was when I got it) I have not heard a complaint the same as my, hard to start.
I purchased my Groove Tubes Vipre before they folded and have had that many years.
From memory this has 8 valves I took it to a Tech of mine last year he had
never dealt with a Vipre he said he could not believe the sound.
Any way I digress.
Have you thought of a UAD Solo 610?
While I can not say anything good about their support on PCIE cards the UAD Solo 610 has a great record.
That's all I have to say really.
Of the Focusrite ISA220 Although it is solid state it is remarkable for
DI BASS and for vocals if the sound fits.
Between the three Preamps a couple have comps and one the ISA has various eq options and comp.
By the way U2 I think used the HHB, My HHb has never been in for repair neither has the Focusrite and the Vipre just needed it's pots cleaned.
If I was buying a new pre-amp the UAD SOLO 610 is what I would at least try!
Grinder
https://soundcloud.com/steve-maitlan...ed-necked-town