A B75 board is around $50.
http://www.newegg.com/Product/Product.aspx?Item=N82E16813157362
You can use one GPU on it and it will be just as good as a Z77 when you don't overclock.
But, if you don't plan on overclocking, get a 3570, 3470, 3350, 3330, etc (there are a few more i5's can't recall all of them). Anything without a K at the end basically.