im in such a pickle

sense i finally got a luxury car, i gotta put a badass system in it. i decided on eclipse components all round(6.5s & 6x9s). i want 3 10"s in the trunk but i haven't decided on which subs to buy, probably rockford P2s
what amp would i need

depends on the total impedance when the subs are wired up

If you got the 2ohm version and wired them in parallel, you'd get them wired down to 1.34 ohms according to the RF wiring guide thingy. You could stick with RF and go for a RF P1000.1