Well im trying to contact Jacob from sundown about those SI bm 10's he reconed, for my ht/music setup in my room. Im wondering if that sub on an O audio 500 watt plate amp at 8 ohms (385 watts) is a decent setup for what i want. I have Polk monitor 50 floorstanders, a CS1 center, r15's for rears and im about to buy a Harman Kardon AVR 247 reciever. It is for about 50% games, 25% music and 25% movies.

Is there anything else i should consider? (such as a different sub or amp)

and

How big should i build the box, what should i tune it to, and how much port area should i give it?

here are the specs of the sub:

RE: 6.89 ohms

Z: 8 ohms

Fs: 27.2 Hz

Qes: 0.56

Qms: 3.32

Qts: 0.48

Le: 2.8 mH

Vas: 31.1 L

BL: 16.2 NA

Mms: 124 grams

Power: 400 watts RMS

Any input on the amp or sub would greatly be appreciated!! thanks