The MSI 890GXM G65 is a good board, my mates just used one to upgrade his lil bro's system from its craptastic old mobo that refused to overclock the PII 955 BE that was in it more than 100mhz, its now sat there chugging away at 3.6 on 1.35v if i remember right
While i was over he was testing it to see if it was all working and he managed to take his PII 965 BE to 4ghz on 1.45v in about 5 mins before we went out.
Not seen any figures of the 1090T in it as of yet but it id expect it to be able to hold its own pretty well.