What is your current gfx, it might be wise to wait a few weeks or months if you current one is still up to par, since there will be new models out from both Nvidia and AMD.
Nvidia with 800-series (out for laptops so far) and AMD with something I'm not really interested in.
There are rumors that Nvidia has problems with the new Maxwell chips and that there might be a high-end card like GTX780 out this year but the rest will be out next year and then it might even have skipped to 900-series. We will see what happens.