So I assume the $3000 is for 7 speakers then.
If I were you, I would wait for the next sale on JBL Studio 5 series and buy 2 ea. JBL 590 towers (<$1000/pr), JBL 520 Center (<$300) for the front three. For surrounds, two pairs of JBL 520 (<$600 for 4 ea.). Like I said, you'll need to wait for the sale, but these have reliably been going on sale about 5 times a year at prices (as I listed in quotations) better than 50% off of MSRP. This only totals ~$1900, but I think it would be hard to find much better for under $3000 and I think you would be better off buying a second PC2000.
A second subwoofer helps greatly in smoothing out the response throughout the room and dual PC2000's will give you plenty of low frequency muscle for the Club and Hip Hop effects!