I have had the rear Ohlins (Howard's #6's) for 40000 miles and just had them rebuilt when I did the new motor a few months ago. Didn't feel ant difference in the ride but figured it was time since my bike was going to be down for the motor anyway. Not trying to "pimp" Ohlins's, just love them on my bike. Besides stock, its the only experience I have so not sure another brand wouldn't be just as good.
This is where I found Ohlin's recommendation to service there shocks every 12,000 to 15,000 miles.
http://www.ohlinsusa.com/ohlins-usa-why-serviceI am certainly not trying to put Ohlin's down for there maintenance or anything else for that matter. Based on feedback I'm sure they make great suspension. Simply want riders to know about the Legend option, based on my positive experience. IMHO, I have concluded that Ohlin, Legend, progressive as well as other brands that I simply don't know about make very good suspension. All designed to improve upon the poor stock suspension on Harleys. The key is that they all do it differently and thus deliver a similar or different ride but not the same. Not exactly the same. Again, IMHO, I think the design features should be illustrated. Not to put anyone's choice down but to help those doing research to understand before they buy. There as so many factors to consider, budget, how you ride, rider and passenger weight, rider size, how you like to ride, maintenance, even differences in installation. Warranty and Origin of manufacture is important to some. I do not believe there is a BEST, more like a best choice for a informed rider. Given all the factors listed above Ohlin might be the best choice for some, Legend for others and Progressive for yet another. One thing I have learned about suspension is that it takes a little research to find what's best for you. That is all that matters.