I had the reference, but sold it a while ago. It is good, but it depends how hard you want to push the clocks. If you want to overclock and do not intend to do water, then I would recommend one of the after market cards with their coolers. If you just want a mild boost in clocks and do not mind a little noise from the blower fan, then yeah, the reference is still good.
It all depends what you want to get out of it.