with 3 dvc 4's your most usable wiring option would be 2.67 ohms (series-parallel) - in that case you'd be looking for an amp that's 1200-1500w at 2 ohms. Kicker zx1500.1 comes to mind.
You could also go parallel-parallel for .67 ohms, but your options for 1/2 ohm stable amps are very limited. The Lanzar Opti2000D would work.