i7 920 @ 4GHz is still a beast at most tasks, I won't be upgrading until affordable 8 cores are out.
I mean, I went from a single core , to dual, then quad. Going to another quad doesn't make much sense to me.
Is that on air? I've always been too chicken to go past 3.2 on my 920. It has one of those gigantic coolers that can run without a fan, but I keep a low speed one on it. Even at 3.2 it was a monster. Still is. I refuse to play/pay the upgrade game when I have something that works so well.
I do recode video so I know Haswell would be faster and cooler.
The only other thing is that I enjoy building, which I haven't done in quite a while now. This older hardware (2x 5850, 4x 74GB Raptors in RAID0) is keeping up fine. Games are great at 1440. PhotoShop is fast too.
I tend to keep things until they full-on break or are completely incompatible. I drive a 21yo car and still watch TV with a CRT. I'm not the typical 'need to have the latest' guy, and my savings account sure does appreciate it!