go with what you want to do and give up the notion of "future proofing".
if a core i5 (for example) will suit your purposes more than a Phenom II (for example) then get the i5 - it will last you a while, especially if you get the 750.
if you're one of these people who has the desire and/or funds to upgrade every year then it's hardly an issue anyway.
yes, AMD have an intentional track record of extending the life of their platforms, which is why AMD will always win out in terms of value, but if Intel suits your purposes better then just go with it.