the only good mobo out for conroe and sli right now is the evga 680i
, but if you can convience yourself that you don't really need sli...then the asus p5b-deluxe
or gigibyte ds3
are good mobos. If you want to save money go with the gigabyte, but the asus seems better to me as far as reviews that ive read on here and other forums (ive only owned a p5b-d and not a ds3 so i can't say it really is better since i don't know from experince, just reading reviews).
For memory, i love my g.skill ram
and ive heard good things about the corsair xms2 series
, but if your not going to overclock, then get some cheaper g.skill or cosair ddr2 800 ram.