3840 x 1600 is a good res for editing, certainly preferable over 3440 x 1440, and will also be very immersive in gaming... providing you have the GPU power to push it. It's getting close to 4K pixel count, so gives you an idea what kind of GPU horsepower it ideally needs in newer games.
The LG38GL950G is probably going to be worth waiting for if you want that higher refresh and G-Sync... although it won't be cheap. There is also the upcoming 43" 4K
Acer CG437K-P though, which will offer even more screen real estate, and from the released price info won't be insanely priced (under £1500 it seems).
If you're not really going to be using this for PC gaming though, only casual console, then G-Sync high-refresh is wasted, and you're as well to go with the 38WK95C or XR38 now. The LG might have the edge for professional features, but is more expensive of course.
