How much is your budget?
Seeing that the new ati cards were just announced might as well wait and watch the prices drop. Im waiting for the r9-290x ro be released to either grab anothe 7970 vaporx or that card. If the specs are legit then this new card will beat the titan for far less. Either way i like both manufacturers but im sticking to ati for now
But Both those choices will destroy every game in 1080p and do well in 1440p and 1600p