I found the stock bars on my '07 caused me to slouch my shoulders a bit. Picked up a set of Craigslist Heritage bars for $10 and changed 'em out in an hour or three (ext. wired). These bars are better, but perfection would be some set exactly half way between the two.
I had the Heritage bars installed on my 09 RKC. It has made a big difference, I can set up straight! I had them installed at HD of Dallas. Bars and install cost $215.00.
16" carlini flyin apes, bought the bars from carlini myself (475) and the dealer got 600 for install, cables, and kury iso grips. Best mod by far comfort wise. I'm 6' and could've went with the 18's but the 16's are really comfy. 2k is WAY too much for a bar change imho
I'm 6' and had to reach forward a bit on my 09 RK. I had the dealer put Heritage bars on. I think it cost me about $150 for parts and labor. They were able to use the the same cable and wiring. The bars gave me about 1"-1 1/2" of reach. Then I installed the Sundowner seat and gained another inch closer. The fit is just right now.