I'm happy you like it! Maybe it was not ahead of its time, but still one of the best HTPC around, for its design, build quality and technical features... even if not so powerful "as is", when upgraded to the max it's still on par with the less powerful desktop PCs of nowadays - and don't forget some models has a BD burner, not bad at all!

I think I'll go with these upgrades, from the first to the last in the future:

GPU (as the other two are "fried")
CPU (Q6700, but if the PSU upgrade will be possible, a QX6800)
RAM (4x2GB)
HDD (2x2TB, SSD should wait)

plus a better PCI capture card than the actual one, with the best comb filter ever made (still should find out which one), and a PCI sound card (ESI Juli@ is the first candidate).