Well my spanky new (some of it) system is up and running - thanks to everyone who offered up advice and parts
Not quite finished (blu-ray, EPG and remote still to sort) but after a whole bunch of messing around I at least have a system that replaces my exisitng analog TV plus DVD recorder set up. TV quality is fantastic and the simplicity of the interface and ease of recording has wifie approval...yay.
Just the one issue I am very keen to get sorted - I would like to use the 'sleep' function at night rather than 'off' as in theory it will allow recording events to wake it. I have been having issues with it not sleeping and/or not waking properly, and after a lot of fuss have pinned this down to the Hauppage 2200 card. Without the card sleep works perfectly, both timed and user initiated. However of course without the card I have no HTPC. I found mention of 64 bit drivers (or lack thereof) causing issues so I've been hunting my way through the Hauppauge site - not overly friendly for non-current products is it?! Closest I can find is a listing for the 2250, but the driver is called 22XX so would that be the way to go? Anyone any other experiences with 64 bit and the 2200?
Oh one other point - the ASUS board is great in all but one aspect - what the hell were ASUS thinking shipping a 64 bit capable board with a driver DVD that won't run on a 64 bit OS??? Crazy....have to say these two points combined make me wonder whether the whole 64 thing is worth it....
System set up so far is:
Antec 2480 black case
ASUS P5N7A-VM MB, E5300 CPU, 2GB ram
Some old Seagate SATA drive
Some old Sony DVD ROM drive
Q-Technology 350W PSU
Windows 7 64 bit, WMC (might try MP, but want to get the hardware sorted first)
42" Viera - 1080i via HDMI
Integra 6.6 Amp via optical