I have the Avalon U5 Di, its a nice peice for live and studio.. but if your running DI from an amp its going through too many sources..to achive the same effect as pluggin directly in. plus your running more cables and that breaks the tone up a little bit, i find that the bass is more responsive, more accurate and clear just plugging straight in. If you have a good bass and Pre amp thats all you really need, the Avalon Pre acts as the amp in my case. I have nice heads too, like the SVT 4 Pro, and an Eden WT800 which are awesome for plugging cabs into and for playing live, but i still like the avalon better in the studio. Im all about simplicity and convience. Thanks for the feedback guys i will keep posting!