HOLY cr@p, this amp is awesome!
#1 $% you :D
#2 i hate you ;)
#3 can we have some sound clips please :D
gratz!!! that's an AWESOME!! amp
as for versatility
paul gilbert uses a gh100, opeth use a gh100, IMO, completely diferent on the tonal spectrum..
though paul uses a boss OD and a couple of other pedals and opeth use gt3-gt6 pedalboards -> bypass the preamp, so basicaly.. it can do anything.
by itself, i'd experiment with the preamp tubes for slightly more gain and have two sets of output tubes ready.. one low headroom, for quick OD and one for higher headroom. you can fit el34's and 5881 in em too