Why buy a Core 2 for use on a board with onboard video? Onboard video is very limited for basic email checking, word processing type applications. If you plan to run games, multimedia, or anything else with a large demand on graphics support you will caught in a bind.
If you want to overclock, don't get a motherboard with integrated video. For instance, a member here bought a Gigabyte GA-965G-DS3 (which has integrated graphics), thinking that it would have the overclocking ability of a Gigabyte GA-965P-DS3. Instead of being able to overclock to above 3Ghz like the 965P version can, he was limited to a 2.66Ghz overclock.