I currently run two R9 280X in Crossfire and recording with AMD VCE, but as I have a 144 Hz monitor I want to run the games I play in at least 144 Hz when recording. This is not possible with the AMD cards because the performance hit when recording with VCE is around 10% and I have read that Nvidia's ShadowPlay has a much less performance hit when recording.
Therefore I've been thinking about selling both of my 280X's and buying one Nvidia card. Maybe a GTX 780Ti? Or is there any better solution?