Hi all, Im about to re-build my nearly four-year old HTPC to incorporate Blu-Ray & HD-DVD playback along with a bit more power for decoding the collection of HD files on my hard drive. After a few weeks of research, I am proposing to order the following spec: Processor AMD Athlon 64 X2 4800+ 2.5GHz Energy Efficient Socket AM2 54.04 Motherboard ASUS M2N-X nForce 520 Socket AM2 6 channel audio ATX Motherboard 39.51 RAM 2GB (2x1GB) Corsair Value Select, DDR2 PC2-5300 26.97 GFX 512MB Power Color HD 2600 Pro SCS3 (SilentPipe) PCI-E(x16) 52.28 Hard drive 320 Gb Samsung HD321KJ Spinpoint T166, SATA300, 7200 rpm, 16MB Cache 46.99 Drive LG GGC-H20L Lightscrib SATA READS - Blu-Ray & HD Disc's black - OEM 136.29 OS Microsoft Windows Vista Home Premium 32Bit 1Pk OEM (DVD) 63.44 Total: 419.52 The HTPC will be connected as follows: DVI 720P Projector HDMI 1080P LCD TV Do any of you have any advice or recommendations? My main concern is whether to go XP or Vista. I just dont fancy paying for an out-of-date operating system. Is there any real advantage of one over the other? I will be using my existing case (Antec Sonata), keyboard & mouse. Any input appreciated. Regards, Chris.