I had the Heritagebars put on mine but didn't like 'em. I went with the wild1 508s and am satisfied. I think I'd be happier with the 518s though. Did have to change throttle/idle cables though.
I got mini apes and they are sweet. Nice position for long rides that allow me to let my arms hang in a relaxed position. I did not like the stock bars on the RKC at all. You have to be sure that you figure in where your seat puts you. A seat that moves you forward or back can mess up any suggestion about which bars are more comfortable. If you have a seat you love then it's about finding the bar that fits you. I have long arms and the mini apes work great for me.
i have a 08 road king classic i put the hertiage bars on myself, there awesome no more pain.. no wire changes either, my buddy saw it now his bike has new bars also... just make sure when u adjust the height ur sitting on the bike.. not by eye or if it looks good ..
I'm 5' 10 and I put on the Road King High Bars. The book says they don't fit but they do. $49 bucks, no cables or wires to replace but you have to bend the brake line just a little. I love mine. Made a world of difference.