If you could provide the info requested in the How to Ask for New Build Advice
, it would be most appreciated.
Budget, TV resolution, date you plan to purchase, and importance of noise (as it's an HTPC) would be very useful info.
If you can wait until January, Intel is releasing a new line of processors that may have better integrated graphics than the current generation. Current integrated graphics on both AMD and Intel are ok for WoW at low resolution, something like 15-20 fps at 1280x1024 (IIRC, I may be mistaken).
If you need to buy now and gaming isn't a high priority, I would lean towards an i3/H55 mobo build. 4 GB is more than enough RAM for right now, though a recent Tom's article suggested 8 GB for future-proofing/resistance.