I'm using a Sony 43" X720E. IPS. I'm quite happy with it, can't complain. It's as good as any monitor I've seen except OLED, and the size is wonderful. I would like to have 120Hz though.

I will eventually go to OLED but 48" is the smallest size OLED TV available, and that's a bit bigger than I'd want on my desk.

Hopefully a reasonably-priced 43" OLED will come out.