i say pull off any upgrade and wait for nvidia and their announcement. It is expected that the new architecture will be commercially available around april. If it happens so the new GPU will be a considerable upgrade (not just in terms of raw power) and if you do plan on the cpu upgrade it wouldn't be much of an upgrade apart from premium parts and that the new cpu will be unlocked and the mobo will have added tweak feats.
So, considering the fact that both the gpu and cpu upgrade will bring few changes, wait for nvidia. And/or you can upgrade other things like your monitor.