It kind of depends on what you are going to do with the machine. Game? Webserve? Compile code? Or just light stuff like surfing, email, some sort of word processor?
I fit into the latter category and the system isn't that important to me.
You can get an idea of Tom's' take on this if you haven't already athttp://www.tomshardware.com/reviews/a10-4600m-trinity-piledriver,3202.htmlhttp://www.tomshardware.com/reviews/core-i7-3720qm-ivy-bridge-mobile-ultrabook,3185-11.html