the epox 8rda+ is nforce 2 board . and yes if you want to oc and wanna go cheap then the 1700 for 42$ is the way to go , more than half the price of the barton , and should go from 1.4 gig ( default ) to about 2gig with ease as long as you have the ram to handle the fsb speed . also nvidia has a newer nforce chipset that is out or close to being out you might want to wait a few and see if it is anybetter . think it is called ultra 400???
as for video i am with jpmiller if you aren't a hard core gamer then that should work great .