Theoretically the IPS monitors should be a big step above the TN monitors but the issues they are having at the moment aren't making them worth the price. Waiting a few more weeks for more reviews to come in would probably be the safest bet. If you play the lottery and can manage to get a good one then it would be well worth it in my opinion. It just seems like no one has gotten a perfect one besides reviewers at this point.
That just shows that they COULD release all 90-100% perfect panels... as the reviewers get cherry picked ones. But they don't and just hope people accept some of these terrible panels I have seen on forums etc.