Solid value because it is the very cheapest M17x base config with only one upgrade -- instead of the okay GeForce GTX 660M, it has the Radeon HD 7970M video card. It does add $200 to the price, but Anandtech says it's the best performance/price GPU option Dell offers for this Alienware laptop.
And Dell must have caught on, because they don't even advertise this config on their site. In fact, on the base config's customization page, they hide the upgrade option to 7970M. To get this GPU they usually advertise a config with other upgrades built in to drive up the price to $2,000 or more.
If you want the cheapest M17x but just want a better video card, this is the deal for you. The next most important upgrade to consider would be to add the 1080p display after you click through above.