I've been passing all my GAS in the direction of new basses and I just realized it's time I upgrade on the Peavey combo I've been using all my life. I looking into a GK head (probably the 400). I've played through enough heads to know that GKs suit my needs best, I'm baffled on the bottom deal though. I hate to admit I know little to nothing about them. What I'm looking for is the cleanest, loudest response at the most reasonable price. I've been checking out cabinet prices and I don't understand the huge price differences. I also know that I've used the same heads with different brand speakers in studios, and there's been a world of difference. I've been considering GK, SWR, and Hartke bottoms. I like the sound of the aluminum Hartkes, but they're always blown out at one of the studios I rehearse in - does this always happen? Can anyone and everyone please give me as much info on speaker bottoms as possible. It's really hard to check them out in the stores cause they get all upset when you crank them, and I'm only interested in how they sound when they're cranked. Thanks.