First off, I'm much more a guitar guy, so i'm used to having tubes and overdrive pedals, and never being full on clean. I joined a band, and am pretty new to bass gear. We recorded an EP recently, and I really liked the studio's old ampeg b25, and would like something similar to the b25's warmth. I've been trying to figure out what amp head to buy next, and of course, i don't have too much cash but would like to be loud enough to go on tour this summer, and of course, sound good! I was really considering the portaflex 500, from what i've heard on youtube atleast, I think i've really become a sucker for the ampeg sound, although i'm open to other brands. But then I read on here about a fault mode, so it sounds like something I may not be able to work on myself, which would make it pretty much out of the question for me, as i generally buy used and work on my own stuff. I'm assuming that there probably isn't a way to take it out of fault mode myself if something were to happen, and if i buy one used, I won't have a warranty or anything, therefore if it were to break, i'd have to pay ampeg some dough to fix an amp head i bought for cheap. I wouldn't mind buying an ampeg b25, there's one on ebay right now for 400 bucks, but i don't think it's going to be enough watts. The band is a three piece, the guitarist uses my 30 watt tube amp, so it doesn't have to be insanely loud, but I would really rather not buy another amp for a while. I thought about building a tube preamp (maybe an alembic clone?) and continuing to use my rather sterile peavey kb300 keyboard amp i'm currently using, as a power amp and cab, until i could replace them with something a little better. I suppose what I'm asking is for recommendations on an amp head, or a preamp/power amp combo, just preferably nothing too clean and sterile; i like a bit of overdrive. It doesn't have to be 1000 watts or anything, but I would like to have some headroom in case our guitarist gets a louder amp. I would like something along the lines of Dinosaur Jr's bass tone if that help at all. I would like to spend 500 dollars or less (used) on a head if plausible. Maybe an svt350? svt3/4/7 pro? Should I stop being so paranoid about the PF-500? Check out some other brands maybe? thanks, and sorry for so many questions! I'm going to browse around here and try to get a little bit more educated in the next month or two before i buy anything.