I am currently running a pair of MSI GTX 460s in SLI, and they are getting a little bit long in the tooth, so I have been thinking about upgrading to an AMD R9 card of some kind, mostly because SC will apparently use Mantle, and I would prefer to move to a single card config. Perhaps once SC uses SLI it will be better but I am still thinking about upgrading.
Obviously getting an R9 290 would be awesome, but my budget being what it is, I am considering the 270, 270X, 280, and 280X version. 280X would seem to be the obvious winner except that I have read a number of user reviews that state that the 280X is really a huge boost from the 280. I don't know much about the performance between the 270s and the 280s, but the price is certainly better (and I am sure they would still be a step up from my 460s).
Anyone out there have any experience with the R9 cards and Star Citizen? Would a 270/270X be good enough or do I need to bite the bullet and hit the 280/280X level?