There are good monitors, and then there’s the Alienware AW3423DW gaming monitor. Now available for just $854 on Prime Day, down from its $1100 MSRP, it’s the cheapest this model has ever been before. And since it’s our favorite gaming monitor, we’re particularly thrilled to see it more affordable. I’ve been in tech media for over 12 years, many of them spent looking for great discounts because no one wants to pay full price. Seeing this Alienware monitor hit a new best price was particularly exciting since I’ve been trying to decide which monitor to get. The Alienware AW3423DWF is the best gam…