Looking for a small rack preamp (Roland Gp100?)

["Janosch K." <daasp@gmx.net>]

Hi,

since there was a topic on a power amp, I thought one about preamps 
can't be wrong :)
I'm looking for a rackpreamp for guitar purposes, preferably one rack 
unit high. What is important for me is that it has at least one channel 
that stays absolutely clean, no crunch. If it has an added overdrive 
channel, that would ne nice but not a must-have, since I can also add 
distortion with my Big Muff.
The only thing I know so far is the Roland GP-100 which seems to feature 
very nice clean sounds with it's Roland JC120 simulation and some added 
effects.

Any other idas?

Thanks, Janosch