it comes down to personal preference and do you have the hardware to run a 144hz display? I mean theirs no point in getting 144hz if you're not going to use it, and really 5ms delay is negligible for me, personally i say 27 inch i like my games to look pretty especially that ips, currently running a 46 inch Sony bravia with 60hz refresh and i don't mind. That said if you got the tech to push the 144hz referesh by all means go for that.