I would stick with the Dual 2.7.
Until Apple really unviels it’s plans for this market. (could it be that they will be going with dual core for High end video, phot customers and sticking the intel into the laptop and lower end market????)
We know that the dual 2.7 is solid, it works, it is very reliable. Go with what is road tested. I always wait for teh second gen of a new product from Apple.
David