Ha, well isn't it pretty obvious? Just get the one with the fastest clock. Technically that's the i5-3570k, but it's only 100 MHz faster than the 3550, so get that. Especially if you're not going to OC, you probably shouldn't get a sandy bridge (e.g. the i5-2500).
which i5 processor is best? I DON'T WANT TO OVERCLOCK AND NEED FOR GAMING
Sandy Bridge platform, get the i5-2500. But for Ivy Bridge, get either the i5-3550 or i5-3570.
yeah. since non k (partially locked) core i5 cannot be overclocked as much as the unlocked k series cpus, it is better to get the the one with higher stock clockrate. however, if the partially locked cpu's price is too close to the unlocked k series one, then the unlocked one would be better for gaming.
i want to buy i5 processor and my budget 11,000 indian rupee($190 approx.) need this cpu for gaming and don't want overclock. tell me cpu for this (dont tell me i5 2500k however this my last choice )