Thanks! Kinda depends on where you live. I assume you live in the U.S. or Canada. I have had absolutely fabulous customer service from Newegg. Couple years ago friend and I built a system using two Asus monitors from 'egg, and at some point within the two weeks one had a problem. We had purchased quite a lot from them ($$$) so I did an RMA over the phone and they even paid for shipping BACK to them, and within 5 business days we had the new monitor.
Sometimes others can beat their prices, sometimes by quite a sum, but the service and speed of delivery is wonderful.
(Last order, to rebuild a PC, was placed ~8p.m. on 8/21 with paid 3 day shipping; couldn't believe it when it arrived on 8/23 about noon!)
My son-in-law swears by Amazon. If you pay to become an Amazon Prime member, then shipping is reasonable or free and is 2day. I have purchased a few things from them, but never had to return anything. Prices are good. Constant emails about their products etc. are a pain.
The Dell you are looking at is a really nice monitor. I am typing this my Dell U2410. If you are going to buy the monitor on credit, consider going directly through Dell by opening a Dell Charge account: That worked well with my purchases, but I don't think they over the Newegg advantage of no-interest payoff within a certain time period based on the $$$amount of purchase.
Hope this helps.