I'm interested in the whole CPU upgrade scene at the moment, too.
I currently have an i7 950. I take it it's worth upgrading now, but what to?
You're better off than me. At least you could throw in a decent GPU and still play some of the latest games at decent settings.
I'm running a Core 2 Quad Q9300 (2.5 Ghz) from 2007. It's a bottleneck for anything more powerful than a GTX 660 (I'm currently using a single GTX 650 Ti, non boost).
I'm more than ready for an upgrade. I was waiting for this fall because I thought Broadwell and Maxwell would both be out before the end of the year. Regardless, I'm still planning to build a new machine soon....although if the 5820k is going to retail for under $500, I think I may just wait....