The RK Custom has been lowered in back and as such does not have the full suspension travel of the Standard or Classic. Those who know the difference say that for touring, especially two up, the Custom ride can be harsh. Also the Custom comes stock with a seat that will not please a passenger and the bike does not have a windshield. My problem is that I like aspects of all three Kings. I like the lockable hard bags of the Standard and the full travel rear shocks, but I like the wheels, bars, chrome wind deflector and tank emblem on the Custom. Of course ya gotta love the cruise control on the Classic, however I could see myself grinding my teeth down to the gum trying to keep the spoked wheels clean and spot free. Soon as I pay off some unexpected med bills, I'll probably find a low mileage Standard and do some parts swapping over time. There are plenty of ride reviews and owners reports to be found online. Many mention the differences between the three. If you are going to spend the bucks, take the next day or two, check owners' photos and bike opinions before you choose one over the other.