Sandy Bridge worth looking at from an e8500?

Hey all, I currently have an e8500 OC'ed to 4ghz, and I was wondering if you guys felt like sandy bridge was worth the upgrade. My main reason for wanting an upgrade is to get a quad core processor in the machine. I feel like games will soon predominantly use 4 threads, and I will start to notice a difference as this becomes the case. I realize that core2quads are an option, but that's talking about spending 200-250 dollars for a processor on a dead socket. I just don't think I can really justify that.

My video card is a GTX 260, clearly needs upgrading, probably more so than the processor, but I will take care of that. The processor/mobo/RAM upgrade is more time consuming, and I was gonna see if it would be worth it before I went the GPU route.

I had also thought of waiting on Bulldozer, but honestly, I have serious doubts that AMD matches intels offerings performance wise. Hopefully they prove me wrong, but that's just my gut based on the Core2, 1156, and 1155 stuff.