I currently have a Peavey Mark IV bass head and a Lab Systems 4x10 quad box (8 ohms) and I'm looking to upgrade the head of my amp setup as I'm not really digging the sound I'm getting from the Peavey. Anywho, I've been thinking about getting anyone of the following as a replacement as I can them bass heads at a decent price: -Ashdown MAG300 ($AU580) -Nemesis NA320 (~$AU950) -Warwick Pro Fet 3.2 (~$AU600) -Warwick Pro Fet 5.1 ($AU749) -Yamaha BBT 500 ($AU850) My budget is pretty tight and will be largely dependent on what i can get for my Peavey head when i sell it. At this stage i definately can't afford anything more expensive than the Nemesis and i will struggle to even afford that. Basically what i'd like is if someone can give me a comparision of the heads i've listed and the pros/cons of each. Has anyone done a shootout with any of the models? The bass i will be using is Musicman SUB (active 4 string).