The GK Fusion 550/ MB Fusion 500, Ampeg SVT 7 Pro, Mesa Boogie M6 Carbine. Which of these 3/4 Heads will likely give me the warmest, deepest, punchiest tone/sound using a 2x15 (or 2 1x15's) cab. I'd like to hear from guys/girls? that actually own or Have owned one or more of these heads; or even if you've ever tried one or more of them out. I play Funk/Slap (Louis Johnson), Classic Rock(Geddy Lee, JPJ-Zepp.), 70's R&B (Verdine White), and yes, Heavy Metal (Chris Barnes, Cliff Burton) as well....(not as much... anymore) Haaaaa!! Anyway, a little help/advice/direction guys, Thanks.