want to buy a new monitor

my budget is 6k ...purpose is gaming and hd video
i have selected
Dell IN2030M 20 inch LED Backlit LCD Monitor: Flipkart.com
and
AOC e2060 swn 20 inch LED Monitor - Buy Online @ Rs.5800/- | Snapdeal.com
which 1 is better aoc or dell?
is it safe to purchase monitor online,and how to check if the monitor is good and without any defects?
what is dead pixels?
i prefer aoc bcz its in my budget.

Need quick help

Any1 reply