Need recommendation for HT system on a budget

I blew my money on a PS3 and 40" Sony Bravia LCD TV, so Im looking for a home theater reciever and speakers that won't cost an arm and a leg. I will be getting a HD cable box to throw into the mix, so basically want I'm looking for is this:

Surround sound coming from both the PS3 and cable, with HDMI video from both as well. There are probably different configurations when it comes to hooking up cables, but I want to have the minimum amount of messing about when it comes to switching between the different systems. I'd like to get a Sony home theater in a box but not sure if that will satisfy my requirements. If anyone out there has a setup they would like to share with me that would be great. Oh, and I'd like to keep it under $400 if possible.

http://www.amazon.com/Sony-STR-DG810-Channel-Theater-Receiver/dp/tech-data/B000OGA7Z8/ref=de_a_smtd?ie=UTF8&qid=1203594498&sr=8-1 for the receiver and

http://www.amazon.com/Polk-Audio-Channel-Theater-Speaker/dp/B0002WTK4S/ref=pd_bbs_3?ie=UTF8&s=electronics&qid=1203594828&sr=8-3 for the speakers

This comes out to about $510 but you simply cant beat that deal and thats about the cheapest your going to find a receiver with HDMI switching and the Polk speakers I hear are really really good. So save up an xtra 100 bucks and get something your not going to regret.