3000+ cubic feet will completely overwhelm all of those systems, so you should probably consider alternatives.
Personally I would start with a 3.1 system and then add side surrounds when you can afford them. Although a bit outside your budget a pair of Pioneer SP-FS12
towers with an SP-C22
and a Klipsch RW-12d
will be a far better choice. Somewhere down the road you can add a pair of SP-BS22
speakers and you'll have the full 5.1 system