For that cash, I'd go:
Speakers: Ascend Acoustics Spring Cleaning Sale
CMT-340 SE mains, CMT-340 SE center, HTM-200 SE surrounds - $948 (shipping included, probably add another $100 for the matching stands)
Subwoofer: Hsu Fathers Day VTF-2 MK3 Sale - $568 (shipping included)
Usually I'd advocate the SVS PB12-NSD, but this sale tips in favor of Hsu this time around
Receiver: Onkyo TX-SR608 ($500ish, Best Buy)
Lots of power, lots of features.
Other choices could be:
Speakers - Axiom Audio and Aperion Audio (check them both out)
Subwoofer - SVSound PB12-NSD
My two cents.