Ok so here's whats up. I've been into audio for a little bit and currently I'm running 2 12" Orion XRTPRO124's off a Elemental Designs NINe.1 Amp running at 1ohm. I was really set on changing over to 2 8" SA-8s, but the refurbs I was interested in are all gone. One of the memebers here, Immutablemoney, said something about running a SA-12 or SA-15. I'm looking to use the money off the sale of my Orions and my box to pay for the sub. Anyone got some suggestion on what would be best? Just looking for opinions.