what are you using atm and can you use it a bit more till some worthy new tech finally comes out (this way you will have some more time to save for new monitor).
few things to consider for new monitor purchase.
do you need 120-144fps to play your games? can your 580 output 120-144fps in your games?
TN at work doesnt bother you (and also you cant do much about it) but do you have to sacrifice picture quality for your fun time.
what is
HDR is it worth waiting is up to you. qdot article on tftcentral is "comming soon" since quite a lot of time but if i got it right from HDR article it should offer "HDR like experianse" at reasonable price till HDR finally comes mainstream (i hope i dont have to wait next life for this
).
samsung already have some
1st gen qdot offerings @1080p 24" and 27" size. may be you will be able to find some nice deals on them online