Building a HTPC, check it out

I currently own
Proc - E6600
Tuner - PVR-500MCE
OS - MCE 2005
Decoder - nVIDIA DVD Decoder
Remote - Microsoft

Need
Motherboard- GA-73UM-S2H or GA-G33M-S2H or any other good ideas
Case- Antec Fusion Black
Memory- 2GB Corsair
HDD - 1x Seagate 80GB OS, 2x Seagate 500GB Storage
HSF- I have no idea for such a small form factor

I am not married to any of these components, just looking for the best-ish.
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OK let me clarify my wants/needs of this system, i really want it to be a PVR, i don't have the kinda cash to watch 1080p video, i have a 25" CRT TV, nothing fancy, im using cable that needs no box, just regular stuff. I would like the system to one day be able to play/record HD content, but right now all i've got, is regular cable and DVDs. Hope that helps narrow my components
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This will be my first attempt at building a HTPC.
Any suggestions are welcomed, I'm getting the itch of building.

thx
SKG

I take it you plan to use the onboard graphics card ?
The Intel onboard is a weak performer even by IGP standards.

What height restriction does the case have (does the stock Intel cooler fit)?
If the stock cooler fits use that until you find a better sollution.
The Thermalright XP120 without a fan is 75mm high but fitting it could be a problem.
http://www.thermalright.com/a_page [...] 20_775.htm
The Thermaltake BlueOrb FX (about 84mm high) is quite low profile and performs well.

For storage your choice (seperate drives for OS and content) is good.

As for future proofing this should be good enough for HD playback (works fine on my Athlon 64 with a GF6600GT card).
I have no experience with recording HD content (no HD content source yet where I live) but I think the HD Tuner card generates a stream of about 5-20MBytes/second and writing that to a hard drive should not be a problem.