I have an Ashdown MK500. I love it!!!! Makes for SLAP/FUNK HEAVEN!!!!! 575watts peak 900watts RMS. You can get many tones out of this head. the only thing is you dont get a super warm low end out of it. But, then I run a Tech21 SansAmp to get some warmth and growl. I have it paired up with two MAG410T cabs. These cabs do not do the head justice. they a rumbly and cheap sounding. I suspect that it will do much better through the ABM cabs. I wish they made the Mark King Bentley cabs. Now Im reserving my Ashdown rig for bigger gigs and venues (weight reasons). So, I just got a MarkBass LMII and two 121H traveler cabs quick pick me up and go to smaller gigs. I highly recommend the MK500.