0.are you sure,i am a gamer,and 750 has 8Mb cache while 2400 has 6Mb.
1.what matters more,cache or clock speed?
2.any other processor better than these 2 from intel within same price range as they are and an amd's equivalent procesor to these two.
For gaming the larger cache size on the older i5s is not really an advantage. The sandy bridge i5s will outperform the old ones consistently in gaming scenarios. Besides, at this point LGA 1156 is EOL and there is no upgrade path without a motherboard change. LGA 1155 will hopefully last longer.