I put Nexen Roadian HPs on my 20" wheels when I bought my 08 EL.
There's almost 40,000 miles on them now and Ive had no issues. No uneven wear etc. They still have good tread. Quiet, no ride issues. They cost me a little over $600 installed with warranty! You cant beat that. Yes I know they're made in China.. but when they're half the cost and work this well I will likely buy them again.
I have Nexen on my Explorer too with no issues (thats why I got Nexen for the Expedition)