I've gone back top 5150 MKII's after trying heaps of amps, including Soldano's, Marshalls, Engl's, Boogies, etc. They just seem to cut in a certain way that I don't hear in other amps, and on the road, they are reliable too. I've tried a few BK pickups too, starting with the VHII, Cold Sweat, Nailbomb and finally the Miracle Man. The MM pickup is the best I have heard so far without a doubt, real tight, plenty of balls, and compliments the 5150 perfectly in my opinion. I'm sure others will disagree, as a lot of people on this forum think the 5150 is cr@p!