Yeah I'm trying to see if I can go the legacy route before I cave and buy new parts, which is looking more and more likely. If I go with a new setup, the only thing I'm likely to reuse is an old
Corsair HX650 that I have laying around. How does the onboard video on the i3 hold up for gaming, if at all?
I have never gamed with it. It handles all of my HTPC duties without skipping a beat. I use Windows Media Center for TV purposes and XBMC for movie playback.
A motherboard that supports SATA III is important if you want to get a SATA III SSD. I see sequential reads of ~502MB/s and writes of ~188MB/s with Crucial m4.
I have that or a very similar Corsiar PSU. Having something modular with be a great benefit for a HTPC, but you won't need that much power for a rig like mine. I am using an Antec EA-380D and it is bit overkill, but mainly bought for its efficieny and quietness.
Are you planning on using Windows Media Center? I use a Ceton PCI Express quad tuner and its pretty solid. Comcast and their management of CableCards is another story. Once setup though, everything is seemless. I use WTVWatcher to watch the Recordings directory for new DVR'd shows. It converts those .wtv files to dvr-ms so DVR-MSToolbox can manage the recordings. DVR-MSToolbox then uses ComSkip to scan the non-copy protected recording for commercials and indexes the shows for future playback. I just sit back and watch recordings while they skips themsevles through the commercials.