i doubt there will be a price drop, but I imagine that you'd be best served by waiting for penryn. I've heard the q6600s are pretty limited in their overclocking potential (many top out around 3GHz) simply due to too much heat generated by 4 65nm cores. at 45nm, I'd imagine that heat would be less of an issue.
Also, possibly more importantly, penryn will support larger caches and SSE4, both of which will really help with video encoding, which is one of the few applications capable of fully using all 4 cores.