This is larger based off renethx's recommendations thread.
I plan on using it mostly for online video, hulu, netflix, etc. divx files and then in the short future adding a tuner card to record OTA HD. No blu-ray since I have a nice blu-ray player already.
ZOTAC GeForce 9300-ITX WiFi GF9300-D-E
Pentium Dual-Core E5200
WD SATA 160GB
Samsung SH-S203N 20x DVD±RW DL SATA Drive
Already have 2GB of DDR2 667 memory for it laying around. I'm sure not ideal but would give it a shot before ordering memory.
If it matter it will be going into a Pioneer 1018 receiver for audio/video. Insignia 36" LCD and Mitsubishi HC1500 projector.
Size matters... 100" will do for now.