Thank you for all of your comments and suggestion. I know what I need now.
HardwareHTPC with ATI Radeon 5xxx graphic card (This card has audio built-in)
BlueRay drive inside HTPC
Receiver with TrueHD and DTS HD MA decoding feature
5.1 speakers
Projector - Optoma HD65 (720p), cannot afford Optoma HD20 (1080p)
ConnectionHDMI from HTPC to receiver, then another HDMI from receiver to projector
QuestionsWith low budget in mind. 80% movies, 20% music. Living room size 24' x 22'.
1) Please suggest receiver that meet my requirements. Prefer Onkyo and Denon
2) I need room shaking effect for movies, but with limited budget. If I buy more expensive subwoofer, but small satellite speakers, is the performance good?
3) What is the minimum subwoofer spec should I get for room shaking effect? Example: 30Hz, 100Watt etc.
Thx.
Added on November 16, 2009, 11:04 amfinally bought Harman Kardon 355 receiver and Klipsch Synergy F1 5.1 speakers with Sub 12 subwoofer.

Now i want to wait for cheaper ATI Radeon 5670 which will be released Q1 2010. in the mean time, i plan to connect my PC audio to receiver using 3.5mm jack. How do i do this? Do I need 3 units of 3.5mm jack and connect them to receiver directly?
This post has been edited by tankteam: Nov 16 2009, 11:04 AM