You definitely wont be shooting yourself in the foot with the AMD build, the i5 650 is only a dual core so if you are going to be doing multi threaded tasks the extra cores of the 965 will help and for almost $100 more the intel build isnt worth it.
looking at the board you suggest can it sli down the road? Also i have a 650w psu currently i don't need to buy one at this juncture till i get to the second wave of parts and purchase a second case. Also i was wondering i read that the the 460 with only 768 was mostly inferior to the 5770 am i wrong? I very much like the feedback please keep it coming everything said is taken into consideration.