My HTPC is in a silverstone lc16 in black to match my stereo gear
6 320 gig WD sata's
athlon 64 3700 (wouldn't have hurt to go x2 but I didn't have the budget)
2 gig (2x1gig corsair value 3200)
Lite-on DL burner
ati x800pro oc's to PE (component video out until I get a real tv then hdmi)
logitech mx5000 bluetooth keyboard and mouse
silverstone sst-st60f power supply (this thing rocks)
And you don't need pro unless you login to a domain, I wish people would stop saying that, get mce, it's pro without the domain logon feature (if you do it right during install it will even do that.)
The coolest thing is the imon that comes with the case, the remote has a nice pressure pad for mouse movement and keyboard control, you can control ANYTHING on the pc with it.
I have a standalone dvr for my cable, once cable card capable dvr tuners come out I'll switch.
I do everything from encoding my wifes anime so she can watch on the bedroom tv, to playing all the latest games, with out any problems! Be nice to have the x2 for encoding while gaming though.....
Edit: forgot the mb, it's an asus a8ne deluxe, everything but firewire, I use my primary computer for video stuff though.