$400 HTPC. 1TB- Blu Ray - Media server. Please review hardware

Hi there everyone.

I currently have a Mitsubishi HC1600 720p projector in my living room. Hooked up to it is my Comcast DVR box, and my old htpc. I have a 5.1 speaker setup with a 5 year old onkyo receiver.

I mainly want to use my new HTPC for dvd's (which I rip onto my HD), watching/ripping blue ray movies, listening to music, pictures, and doing backups of the other PC's in my house. Recording/watching TV isn't really a big deal to me at this point because I already have comcast DVR, if I ever wanted it I could just add a TV tuner anyways. Playing games arn't a big deal either because I already have a gaming machine.

One concern I have is that might Receiver has no HDMI inputs/outputs, although it does have 2 optical outs.

I plan to use MediaPortal and was hoping to get some kind of media server up so I could view movies/pictures/music on the road.

Oh, and last thing you should know is that I already have an Antec Sonata 2 case which I plan on laying down horizontal, and a 450 PSU.

Since I am new and cannot post links to my wish list, here is all my items via newegg:

- ECS BLACK SERIES A780GM-A AM2+/AM2 AMD 780G HDMI ATX AMD Motherboard $68.99
- AMD Athlon 64 X2 7750 Kuma 2.7GHz Socket AM2+ 95W Dual-Core black edition $64.99
- G.SKILL 2GB 240-Pin DDR2 SDRAM DDR2 800 (PC2 6400) Desktop Memory $25.99
- 2X Western Digital Caviar Green WD10EADS 1TB SATA 3.0Gb/s 3.5" Internal Hard Drive $84.99EA ... X2 - $169.98
- ASUS Black 6X Blu-Ray DVD Combo SATA Model $89.99

Total cost = $419.94 with 2TB or $334.95 with 1 TB

So what do you guys think, will this meet my needs? TIA!