So far I am very happy with them. With how much sidewall there is (37" tire on 17" rim) they are fairly stiff so they feel pretty good on the highway with good traction. They are also much quieter than the Toyo that I ran before (and was very happy with). Offroad they have tons of traction, and the stepped lug walls clear debris well. After mixed terrain, some decent rocks including sharp shale on Gold Mountain they are wearing evenly and with only one small chunk. The only real downside I can say about the Falken is that it is a heavy tire, but at the same time if you are going to have thick treads and sidewalls you have to put material there, and material equals weight.
As for wear to get them, I am a big fan of America's Tire. They have always treated me well, and normally have fair prices. Their nationwide hazard warranty is also hard to beat. There is also a smaller shop in Covina called Tucker tire. They have great prices and a true family feel to the shop, but I keep coming back to the Americas tire warranty. If you can't find them let me know and I will make some calls and see if I can find a set.