I really think you need a high current, or at least a high(er) power tube (>100wpc), amp to get the best out of the 3A-Sigs for rock and large scale music w/ drive.
Having said that, check out these amps for rockin': Rogue M-120 monoblocks(w/KT-88's), VTL 125 MB Monoblocks, and definitely these Manley Snappers
Having said that, check out these amps for rockin': Rogue M-120 monoblocks(w/KT-88's), VTL 125 MB Monoblocks, and definitely these Manley Snappers