Home Theater systems help

So im pretty good when it comes to tv info since all the research and work i did in getting my tv but i blow when it comes to home theater systems..anyways heres whats up:

i currently own a 40" 1080p samsung tv

its hooked up to my ps3 via hdmi

i want to buy this http://www.amazon.com/Samsung-HT-Q45-Five-Disc-Changer-Theater/dp/B000F784UQ/ref=sr_1_3/002-0423468-9725630?ie=UTF8&s=audio-video&qid=1173679342&sr=1-3 home theater system ( i dont even need the DVD player)

My question: what else do i need to get the surround system to hooked up to my tv? do i need another HDMI cord to get the best sound? does the system even have a HDMI slot? thanks for the help

The thing with budget a/v receivers with HDMI is that they are passthroughs only, so they're just acting like a HDMI switch. The receiver won't be using the audio signals from the HDMI signal.dmanrevived

This man speaks the truth.  Here is the best receiver that I have found that will take PCM over HDMI that is somewhat affordable: http://www.amazon.com/Onkyo-TX-SR604-7-1-Channel-Receiver/dp/B000HD7FGM/ref=pd_bbs_1/104-6166450-1722354?ie=UTF8&s=electronics&qid=1173744938&sr=8-1