best sub-sat system for less than $2000

I am looking for five speakers and a subwoofer as part of an inexpensive HT setup. The source will likely be a sony 9000 ES and the speakers will be driven by either used 5.1 pre/pro and 5 channel amp or a HT receiver. The room is around 20'x 14' with 10' ceilings. I watch and listen to DVDs at a low to moderate level. The sub and the sats need not be made by the same company.

Also, any other comments or suggestions regarding a HT setup approximately as described above would be appreciated. Thanks.