I'm nearly there with a decision on my new amp. Is it worth paying out an extra £260 for the X-treme 5.1 or should I just stick with the ProFET 5.2? I tried the ProFET 3.3 through a 4 Ohm WCA Pro 410 and thought it was pretty good but I need more power. I'm having issues trying to justify the X-treme over the ProFET though. Has anyone compared the two? Are they both as loud as each other? Also does anyone know roughly what power these heads put out at 8 Ohms?