So I picked up a Epi UL210 (4ohms) and I have yet to buy the head for my practice setup. I have played thru the LMIII, which I really dig, but I'm very curious about the F500. I think it would be cool to have the extra shaping capabilities in the mids. Unfortunately, I can't find an F500 to play ANYWHERE. Can the F500 produce the nice round bottom of the LMIII? My sound is ultra-modern with lots of sizzle. Lately, my low and mid on my bass have been set flat with a slight bump in the highs. Should I go ahead with the F500 unheard? Anyone own/play both?