I love the Mass Effect universe and there is so much they could explore, but this isn't the BioWare of old and I've lost some faith in them. Would I check it out? Sure, but I'm no where near as excited as I would have been 3 or 4 years ago.
If your PC is going to be used for gaming primarily then I would suggest getting an i5-3570k. The i7 isn't really going to increase the performance in any of your games and the i5 should be more than enough for quite some time.