if you want 2 12's go with anything that handles 4ohm 350RMS each wire them in parallel, class A's are better for pushing subs but not always necessary, nor cleanest sounding. if you don't want to run a crossover then get a Class-D. I know I realized that I'm just re-iterating what ONEO said. I was running 2 12" MTX Jackhammers on a sony 1250watt amp with ran about 400rms true rated in a West-Coast/Orion ban-pass box and that **** hounded. The best sound I could ever get.
IMO you should get the subs you like then get an amp that runs them well. Don't get something to fit that amp use that on to power upgraded door and deck speakers and run a class d on the subs bridged and parallel depending on the box you use ban-pass parallel and bridged, sealed with individual chambers go bridged only, ported go with parallel - too much power with no compression = blown speakers
