About to move up to something that will power my SVT 6/10 cleaner and with alot of head room. I am wondering if anyone has some experiance with the sound quality and reliability of these two companies? I'm thinking of getting a new B4R or an SWR 750x. The things that are most important to me are pure clean punchy power and alot of it. I just want one head to put in my rack to replace my Mesa m-pulse 360 thats a little under powered for my cab. To get what I think my cab is cappable of I feel I drive the Mesa into to mutch saturation and she sounds dirty. I'm selling her or trading her in on one of these amps mentioned above. Don't want soft mushy tone I want It to hit like a hammer, sort of crystal clear but possibly bruse your kidneys if you stand to close durring a low B. Would dig hearing from you guys.