i need another preamp to use with my stereo tube poweramps. Allready have art, haffler, marshall. interested in trying or buying boogie rectifier preamp, groovetube preamp, carvin quad x, demeter, kittyhawk, etc. Heard great things about the quad x , and groove tube. the boogie looks ultimate , but its prabably goona be go to guitar center with one of my amps and see what sounds best, of course different tubes make them all sound different also. Im sure in reality theyre all acceptable and all sound good but i am only going to buy one since i already have 4. If guytron made a preamp it would be the one. The ultimate preamp would have a fender clean sound and a vox overdrive which leads to the conclusion why not try a tube vox floor unit. I heard in person one the guy in black oak had and it sounded very acceptable. Also of course i could try a line 6 pod. It would be neat if line six made a unit with REAL tubes, output and preamp instead of simulations. So what are the tried and true opinions of those that have tried them all????? really looking for vox sounds ( why did i sell all the ac-30 s i bought from aspen pittman??) I still have lots of cabinets with blue bulldogs and old marsahall cabs so thats taken care of. can we just build our own tgp preamp ?????