I got a Plugable USBC to HDMI adapter for my 13" tMBP to drive my 27" ASUS monitor and it runs fine. I had been running that monitor from my desktop Mac with the dual link adapter.
If only my monitor had HDMI Its only Dual Link DVI so looking at a pair of view sonic 32inch 1440p Screens now.
http://www.viewsonic.com.au/products/lcd/VX3209-2K.php