viewsonic vx 2453 hm or samsung px2370 which should i buy

i was searching on the net and after a search i am confused between vx2453 and samsung px 2370 ......my main purpose is gaming .....the viewsonic and samsung both have a response time of 2ms bt the constrast ratio of viewsonic is
30,000,000:1. whereas the dynamic contrast ratio of samsung px 2370 is 5000000:1 ...so please guide me which led should i buy and which is the best please help