The 6 Core CPU Does sound nice and would help a lot.
Would it be safe OC'ing that to 4.5GHZ?
Yes, i believe most people go to 4.7 - 4.8
just look up a guide for oc'ing that processor. or i believe their is an amazing guide to overclocking in general on this forum. follow that and you should be fine.
I have the I7 3770 and i've overclocked that to 4.3 GHZ with a £35 CPU heatsink. im very confident that zalamn cpu heatsink will get you to 4.5 and keep you under the heat threshold (and im still way under threshold)
anyone else think the same? different?