I want to go with a Crossfire setup

guys my board only supports xfire and I'm currently sporting a gtx 460 I want to go with a xfire setup and have been offered a hf 4890 or I could sell the card and spend £40 more on a hd5770 any ideas as the performance seams pretty similar on both cards

How important is DX11 to you?

i would go with it for only ONE reason as red said, DX 11. If your planning on snagging titles like 2012's CoD, get the HD 5770, but in my opinion if ur gonna get that, really man just spend even 20-50$ more (like 20Euro?) and get this...

http://www.yellowtideusa.com/produc...DC{47}2DI2S{47}1GD5-%2d%2d-0O004U8P2KB99.html

A more powerful single graphics card is better than a 5770 crossfire setup, less heat and noise and also if you go for CF you might need a new power supply.

my current card is dx11 but I wouldn't mind going back to dx10 as I cant really see much differance so I might go for the 4890 and pick up a decent 5 series later when prices drop