My last VA was the 37" Westinghouse that was all the rage several years ago, and I was happy as a clam gaming on that behemoth, so my thinking is that the VA panels these days can only be better than those of years past.
That was also my main monitor for 6+ years! I loved it and now its used as a TV. Still going strong and still looks great.
Sometimes I would get eye strain though from that one- I am sure it was because I was sitting too close. With this one I don't have that issue at all. I have been loving this monitor. Lately I have been playing watchdogs, ESO and Skyrim on it and the picture has been amazing.
I have not noticed input lag and have been able to run on max settings with my 6GB GTX 780.
I think you will be so happy with this you may not be looking to replace it for a good long while.