When i was in the same situation, here is my answer...get the best of both worlds
get a IPS that is over 60hz.. simply
you may ask how, well i too have a 270x, i bought my stated monitor above^^ which is a beautiful IPS, but to make it faster you overclock the Hz, its SOOO simple to do too, you dont need a program or anything you can do it in windows. I have my IPS panel at 75Hz at the moment, being ASUS they make great panels, i could easily go up i believe. I just havent done so. Some people get IPS monitors and clock their Hz all the way up to 100+hz. Deepening on if you are lucky, so it you cant decided....just get both.. get a ips panel and slap a 60+hz on