5850 Sli or Eyefinity?

[lazypnk]

So I've built myself a computer currently running pefectly,
X4 955 @ 4.1
8Gb OCZ DDR3
MSI Twin FrozR II 5850 @ max OC on CCC
700w Gold Coolmaster PSU

I'm not having problems running games tbh I'm overjoyed being able to max out BFBC2 online with max frames up to 100fps and never dipping below 60fps and this is on 1920x1080 ( also I'm aware this game is heavy CPU dependant )

But I've seen people drooling over the next best card from both ATI and Nvidia, but I don't fancy chasing the next best thing every couple of months and watching my money fall down the sing lol.

So the question Is should I go for another 5850 for some future proofing?

Or should I max out my playing enjoyment with 2 more screens?

Ive heard you can't pair Eyefinity and Crossfire but I could be wrong :S

Any suggestions would be nice.

 

[lazypnk]

Thanks for the reply

When you tested eyefinity did you get unplayable results ?
Because when I look at benchmark tests for eyefinity for the 58xx series there quite dated even though there using things like i7 CPU's and the such.

 

[lazypnk]

Ok so I did a little searching and I've found my Mainboard is x16 and x4 on the crossfire side.

http://www.overclockers.co.uk/showproduct.php?prodid=MB-034-AK&groupid=701&catid=1903&subcat=1481

Would this cause any problems for crossfire if not I'll snap up a second R5850 asap