I'm still waiting on a review of the BenQ that assesses input lag. G-Sync
increased input lag at high frame rates (130+ FPS). AMD
claimed that FreeSync wouldn't do that, but since the product launched they haven't been marketing that difference.
Not sure why, either it's not true or the marketing department is inept. Either way I want to know before I lay down cash. Unfortunately monitor reviews are pretty dire. TFTCentral seems like one of the best sources but they didn't test G-Sync input lag at all. Blurbusters is the only site that I know of which did a thorough test, but they produce very little content.