Yeah the bulk of my work is in either two extremes, 1080 or 4K these days. My main client has both a Scarlet and an Epic and several of my short film clients like to ask for 4K masters.
The 680 2GB cards are easy to come by. The 690 is near impossible and the 4GB 680s and the 8GB dual 680 have yet to be released. But rumor has it even with all those cuda cores and bandwidth they still get trounced computationally by 580s. However I would love to know how the current 680’s work in Resolve before buying old 580s that are already End of Life.