I have dual 10" P2's in mine.400watts RMS
They sound REALLY good.
The P3's are supposed to sound even better,
but I haven't personally heard them.
As long as you stay away from the P1's you'll probably be happy.
I suggest a Rockford Power T-500-1BD to power it.
Rockford Fosgate Power T500-1bd Mono subwoofer amplifier 500 watts x 1 at 1 ohm at Crutchfield Signature
I got a great deal on mine for $250 @ Cartronixplus.
That's no sh*t either.
Brand new and unopend, hasn't given me any problems.
Rockford underrates their amps.
It was tested and is certified @ 800watts out of the box.
Unfortunately, it looks like they're not carrying the Power T-500-1BD anymore.
I see a P-500-1bd there for $270, but that's a lesser amp.
I personally would match that with a P3 sub, it might make your nice P3 sound like sh*t.
It's a decent price though I guess.
Think if it were me, I'd wait for the T-1000-BD or the T-1500-BD to come back into stock. Either one would still be cheaper than buying the T-500-1BD at Crutchfield for $579.
Here's the link if you're interested:
Just go to amps>>>then Rockford Fosgate.
Yeah, that's too much power....but you don't have to turn it up that high.
Better to have too much, than too little.
And you'll probably never have to buy another amp for bass again.
Might need one for your other four speakers to keep up with it though...lol.
Hope that helps.