OK, so here I go one last time. I have now pitted the Euphonic Audio against the Ashdown 500 and the Aguilar 500 and the EA has come out soundwise on top (for me at least). Now I am comparing it to one last amp, the Thunderfunk 550. Here is the situation: I have an original i-Amp that Ashdown made for EA. I actually like the sound but I need more headroom and wished it was fuller in sound. (Which I have heard that the newer EA's have) My Set-Up: -Read Custom passive 4 string bass w/ Lane Poor p/u's and Mahogany body (I love this bass- my one and only- I have had it for 4.5 years now) -Epifani 2x12 (an older version put out in 2000) My sound: I like the openness of the i-Amp that I have. I play chords quite a bit and like a very clear and articulate bottom end. I like my sound to be slightly warm but not too much. I want to be able to cut through the mix well, but would never want to have a "growly sound". I like the highs to sound "piano-ish" as they do with my current i-Amp. Please help me to end this long, maddening search for the ideal amp! Thanks!