Fantastic tone and technique! I have played those 5150s before, and I didnt spend enough time with them to get the results you get. One of the tube amps
I have is a 1985 Peavey Butcher I bought in '86 and is the forerunner of the 5150 series (actually, its more of a Marshall super lead 100 with 6L6 tubes). I get a similar tone from it, but no FX loop :-(.
How bout those SD 59s? I have a Jackson with a pair of SD SH6s and it rox.