The i5 750 is certinately a very nice chip, one I would recommend for gaming without a question, but if you use your PC for more than gaming, then the Phenom x6 range is beter value, It is also no slouch in the gaming department, whilst not matching the i5 750, is does not dissapoint and plays every single game on the market with loads of performance to spare!
The 1055t is still better value though as it will OC to exactly the same as the new 1075T, so i would not waste the money, go with the 1055t and OC it (I men 200mhz for free, why pay for it when you dont need it, also my 1055t makes 4Ghz on 1.5v and over 3.8ghz on 1.475)
Nice speed bumps though, and dont forget the shafting everyone is getting now buying a 1156 board! Damn things sometimes move too fast!