no just strap them and run them at 2ohm's. same power as both wired at 1ohm indepently with less distortion and and less current draw. and less money spent too.
I say pretty close to 1900rms.
if i were u and i also have the same subs, id go ahead and get another t8100, upgrade the electrical a bit and beat the shit out of those subs
you should be cool w/out a bigger alt. if you follow Iso's advice, you should be fine. I threw a 15" L7 in a 91 civic powered by a 1600 watt hifonics amp, brutus sereis and it was fine with just an extra battery in the back.
you guys are trippin about the gorilla glue dude. That stuff is the shizNit. It bonds and seals simultanously. You have to be careful with it and know what your doing. Been using it for a couple years now.