Should I Buy a 5870 or wait untill 6000 series is released?

[sam3]

Hi everyone,
Ive nearly finished my computer upgrade, i just have to choose what graphics card to get.
Im currently using my old Zotac GTX260 (192 core edition) and its starting to show its age in some new games. I was thinking of getting an ati 5870 and using the 260 as a physx card.
There's been a few rumours on the net the the ati 6000 series will be released in a few months but they also say that it will just be the 5000 series revamped.

My question is should I get a 5870 now or hold out untill the 6000 series?

Thanks in advance for any replies as I just cant decide myself

Sammy

Edit: Update thanks for the replies everyone I ended up waiting and got a 6970 in the end