The revised list as it is now:
Motherboard: Asus P5V800-MX GPU: Asus Nvidia N6200/TD 256MB DDR SDRAM (AGP) Memory: Kingston 512MB PC3200 ValueRam *CL3* CPU: Intel Celeron D 346 (Socket 775, 3.06Ghz, 533Mhz FSB, 256KB) Harddrive: Samsung 250GB (SP2504C, 7200RPM, 8MB, NCQ, SATA II) Case: Enlight EN-7473 Desktop 200W Zilver
TV: Hauppauge WinTV PVR500MCE (Amity2) OEM
Remote: Microsoft MCE Remote Control Kit
DVD-RAM: NEC DVD +-R/+-RW ND-3550 DD zwart OEM
WiFi: Sweex Wireless PCI Adapter 54Mbit
CPU-Cooler: CoolerMaster Hyper L3 (Socket 775)
I read that Samsung harddrives should be a bit more silent than maxtor. Also the CPU cooler should make the thing a bit less noisy.
Also, Motherboard / CPU / Memory should be compatible now
My only concern with it now is how much noise the case (power unit) will make

It should be quite quiet
