Which LED monitor i should buy

I want to buy a LED monitor for my CPU. I have three monitors in my mind. First one is Samsung S23B370H and second one is Dell S2340L and the third one is Dell S2440L. I think samsung monitor is with TN panel and S2340L is with IPS panel and S2440L is VA panel monitor. I want one from these three for my rig and also for gaming . My CPU configuration is :-

Processor Core i3 2120
Motherboard gigabyte GA B75M D3H
Ram 3 GB DDRIII KIngston
HDD 1TB seagate
Graphics card Nvidia GT640 2GB DDRIII


Please suggest me which LED will be good for gaming. what will be the price at chandigarh.