Buy now or wait?!

The 4th generation processors just leaked last week. It's still unknown when they'll release, but they only feature a 10% boost in clock speeds.

Unless you're very patient, I would just get them now if you need them. Besides, these are just leaked rumors, and you could be waiting for a while for them to actually release.
 
Haswell will be out the first week in June with a ~10% clock for clock performance boost over Ivy Bridge. Should be the same price for the equivalent processors. I would wait a month.
 
Ohhhhh yeah, now I remember that timer in nanoseconds... lol. Yeah, so the 4th gen chips will be out in early June. So if they are indeed the same price and the 3rd gen don't drop pricing, then I'd get those. Either way you should wait if you can.