I5-2500k ($220) vs i5-3570k ($210)

So, now that Tiger Direct has the new Gen3 chips up, they have much lower prices than Newegg. So I'm wondering what would be the best choice for a new build. At $10 less should I go ahead and get the new i5-3570k, even though it has less of an overclocking potential?

I'm sure it'd be better at stock speeds than the i5-2500k, but seeing as the i5-3570k supposedly can't overclock very well, in theory, you could overclock the i5-2500k higher than you could an i5-3570k making it better. So is the i5-2500k still the better choice? Also, is there really any need to overclock or would I be fine leaving either of them at stock clock?

Also, though I'm not sure how much of a difference this makes, I've noticed that while the i5-2500k uses IntelHD 3000 as it's IGP, the i5-3570k only uses an IntelHD 2500. Again, like I said, not sure if that'd make a big difference to someone using a standalone GPU (such as GTX 580 in my case), but just a thought.

So which would be the better choice, assuming that the Gen2 CPU's don't drop any lower than that by this Friday?

Thanks!