I have Nexen on my Explorer and Expedition.
On the Explorer now for 2 years - 17" - total cost $600
On the Expedition for almost 1 year - 20" - total cost $660
They have pretty good reviews, I know a few other people that have them and no complaints. One of my friends has a Turbo Buick and races with Nexen tires too.
Yes I know they're made in China (so is just about everything else in our lives) and if I didn't know people who have run them Id be more skeptical.
If I can get a US product for a bit more money I do, but when the next closest quote on tires I got was well over a grand... $660 installed, balanced and with warranty sounded too good.
I have no regrets...
Ive been very happy with them on both the Explorer and Expedition, especially for the cost.
They've been quite, smooth, virtually no wear and great traction wet or dry. (I have no snow to worry about)