ericmaxman,
Below is the price breakdown of my config. I've included the OS as it wasn't fair not to have it in the list.
1. Silverstone SG-01B Evolution Casing <-- Budget Destroyer!

(RM529)
2. Coolermaster 350W PSU (RM60 bundled deal with SG-01B)
3. Gigabyte MA78GM-S2H Motherboard (RM310)
4. Kingston 1Gb DDR2 RAM 800Mhz - X2 (RM160)
5. AMD 4850e cpu w/ stock HSF (RM288)
6. WD 500Gb SATA HD Greenpower (RM255)
7. LiteOn 20X DVD-RW SATA Super AllWrite Drive (RM95)
8. VISTA Home Premium (RM340)
9. Microsoft Wireless Mouse (RM0 free with VISTA)
10. HDMI cable (RM85)
Total = RM2122
Skylinestar,
Can I leave it to you to test the 1080p sample? I do not have any 1080p media yet (Not motivated to get as my LCD TV only capable of 720p)
Can't really advice you on codec enabling/disabling as well as audio setup. I just install kLite Mega Codec Pack to settle everything for me. You should be able to output AC3 through the SPDIF out on the Gigabyte mobo.
I have no regrets getting this combination of mobo and cpu. This is actually the first PC I've put together that is almost silent (no detectable fan noise, and only the occasional clicking of the HD). Be sure the lap the bottom surface of the stock heatsink if you intend to use it though, it's not really flat and a bit rough

Added on July 10, 2008, 10:44 amcpu usage while playing 720p media is averaging around 32%
This post has been edited by boonhoong: Jul 10 2008, 10:44 AM