There are alot of variables that come into play when it comes to seat selection. Riding style (joy riding, day trips, road trips) rider height/weight, etc. Since I am new to HD's, I've been giving my stock seat on my 08 FXDC a chance to prove itself. 219 miles yesterday, and it proved less than worthy. I do mostly cruising around town when I ride, and day trips on the weekends, but I really live for those few weekend trips and a week or two road trip each year, which is usually what I gear my bikes towards. That being said, I've been told that the Sundowner seat is an excellent selection for long rides. The stock seat wasn't excruciating, but I definetly felt it in my lower back, as well as my tailbone, whereas I've never had any low back soreness on other bikes I've owned. I'm looking at a seat for 300-500 mile days. Suggestions?