"Will probably go with the I-3770k since my Motherboard supports it"
That is the exact kind of information that is of value when asking "What's better for me?". A motherboard costs a hundred dollars. Moving to AMD would be $200 CPU + $100 mobo, or you can just spend that $300 on a CPU that fits in your current mobo and end up with a quicker system overall. If you had said that you were running an AM3+ mobo, I'd tell you to drop in a $200 FX-8350 and call it a day. By the same token, it's real hard to find the $100 difference in a $200 i5-3570 and a $300 i7-3770. That $100 is probably better spent somewhere else, like a new keyboard, or chair, or fancy garbage can for your office.
Since the upgrade in question isn't until next year though, this is all wanking for the sake of wanking. I'm fairly certain that none of us here are precognitive and the correct answer today means nothing a year from now.