Hello, Been on the lookout for a low wattage, rack mount tube power amp to replace my QSC PLX series amps, since I no longer gig. Has anyone tried the respective Mesa or Marshall 20/20 power amps? I found a decent deal on a Mesa 50/50 and am tempted to pull the trigger as these are be stepped down to 15 watts per channel. Some research indicated that the 50/50 is voiced to emphasize mid and highs, which may mean that without modification it may not sound decent for a bass. Does anyone have experience with these? I asked some custom amp builders, but the are asking upwards to $2000 to build one and am looking for something that costs less..