Upgrade time approaching

Hi guys,

So I am giving serious thought to upgrading the GTX460 card in my current machine (specs in profile).
I was looking at getting a GTX670 in a month or so (not interested in AMD cards as I use Adobe Premiere Pro so need NV card for Mercury Playback Engine).

My question is does anyone have any idea whether the i5 760 processor would be a bottleneck at stock speeds with a 670? I did have a mild 3.2Ghz overclock on it a while back and I understand they OC fairly easily up to 3.8-4Ghz. Cooling shouldn't a problem as I use a Corsair H50.

Its running at stock at the moment since installing an SSD recently and I saw no need to overclock as it seems fast enough for pretty much anything I use it for. I read a few other forum posts and saw conflicting advice so came back to good ol' Hexus :p
Basically I don't want to/ can't be arsed OC'ing so I'm hoping I won't need to!

gtx 460 768mb or 1gb version? it's not just ram that a difference in these two cards.

bottlenecking is a bit harder, basically the slowest part of the system holding back other bits, off hand I doubt it, the software it self not fully utilising the hard ware is often the case and that's where overclocking can make a difference, it's the brute force approach of pushing badly optimised code through as fast as possible.
It's normally on multiple graphics card or monitor setups that cpu bottle necking shows up.

The 460 is a 1Gb version but I was more thinking about the CPU at stock speeds holding back a new GTX670?