HT system
Crazy,
I would recommend budgeting a minimum of $1500 for a decent 5.1 bookshelf speaker system and receiver. Obviously you can spend more money for a bigger sub, floorstading speaker, receiver w/ HDMI etc. Post some more specifics like your listening preference, room size, etc.
5.1 speaker and sub package: $1k
Check out the SVS package or the Onix X-LS speakers from AV123.com
7.1 Channel reciever w/out HDMI: $400, Yamaha RX-V659
DVD, CD, SACD, and DVD-A source: $150, Oppo DV970HD
You could always use the PS3 as a BluRay, DVD, and even CD source, but a seperate component might be more convenient.