Yet another upgrade question (Skyrim related)

Hello, All
I Just upgraded my comp with the following:
Z68XP-UD3
I5-2500K (from a amd9600+)
8gb Ripjaw 1600mhz
650w Corsair
However, I'm still running a 4870 1gb. My question is this. Would it be worth it to upgrade to a 6000 series or maybe crossfire a 4890. Or should I wait until the 7000 series starts to come out. I upgraded mainly for Skyrim and SWTOR, however, I do game primarily on console (due to my comp being upgraded). I do use a 1920X108 on a 23" monitor. Thanks In advance!