I currently own an XFX R9 280x. Performance is fine, but I'm eager to upgrade to a FreeSync monitor and the 280x is running on GCN 1.0, which is not compatible with adaptive refresh tech (gotta need that sweet GCN 1.1 and up!). It's either winning a Polaris card or waiting for the cheapest Vega card. In any case I'll repurpose the 280x as a crossfire card for one of my two friends who also have them.