Worth upgrading for BF3?

[captainspork]

I've been running a 4850CF setup for 2-3 years now. It's done pretty well but I have to run the BF3 beta at 1440x900 and all lowest settings. The 11.10 preview drivers helped a bit but my frame rate still goes as low as the high 30s in certain areas.

I wanted to wait until Southern Islands/Kepler come out to upgrade, but it looks like I won't be able to enjoy newer games this year unless I get something sooner.

Would a GTX 560/Radeon 6870 be a worthwhile upgrade over a 4850CF setup? My setup is supposed to be pretty close to a single GTX 460 in most games (sometimes faster, sometimes slower). As long as I can run BF3 at 1680x1050 at low settings and get 80+fps consistently I'll be happier, but I still don't want to spend money on a very marginal upgrade.

Other specs:
i7 920 @ 3.0Ghz
6GB corsair dominator @1600MHz with tight timings
850 watt Corsair HX PSU

Thanks for any input!

 

[hellfire24]

your cpu,PSU,RAM are good but what's your approximate budget?

 

[captainspork]

I was thinking around $200. The idea is to get something cheap that's also a decent upgrade to tie me over until next year when better cards are released. If it's not worth upgrading at around $200 I might go a little higher and consider cards like the 6950.

 

[hellfire24]

well i suggest you to wait for the release of bulldozer(i know that bulldozer has got nothing to do with GFX)and price to fall.as nvidia will be releasing its 6xx series along with ATI's 7xxx series,the prices of 6000 and 500 series will definitely go down.i guess
hmmmmmmmmmmm.i am a bit confused ATM