I was also looking at
tftcentral which seems to go pretty in-depth for their reviews.
If you're OK with a 27" regular monitor, at Newegg there is the Nixeus EDG27,
EDG27 Monitor at $299 on sale for a few more days only.
I'm hoping this doesn't violate any rule here, if it does of course I will edit it out, but further I have no business association nor will reap any financial profit from the Newegg recomendation.
I'd been looking at the Nixeus EDG 34, but can't find definitive data about the bit depth of that monitor.