geo - how's the Ivy bro.?
I was an early adopter, and bought a 2600K.
In time, I found that I did not use the hyperthreads, and disabled them. The value of the extra cache is still unknown.
Had I known early, what I know now, I would have bought a 2500K.
I sold the 2600K for close to what it cost me to buy the 3570K.
The 3570K has an easy OC to 4.3 with no problems with voltage or heat. I just raised the multiplier, and let the voltage stay on auto.
In fact, 3570K idle temps are actually lower.
I need no more, so I have no incentive to go past 4.3
If one has a 2500K, there is no value in changing to a 3570K. For a new build, I would go 3570K on general principles.
Slightly better performance for slightly higher price.