Jen,

There are alot of possibilites out there. With your budget it may be stretching it a bit but I would be awfully tempted to go seperates and start with 2 speakers and a sub. Then save up and get the rest later. Outlaw audio makes some great gear and you could get a B-Stock pre pro/amp combo for about 2k. Or you could go used on the amp from Audiogon or EBAY. A pair of Paradigm Studio 20's would run you $800 and you could get an Hsu or SVS sub for under a grand.