There is no best cam. You need the airflow potential to reach your goal without too much higher or worse yet lower variance. Software math and experience help there.
The SE585 is a torque move and compression would have to be watched. The SE 259E is a midrange choice. There are so many that will work but the way the bike is ridden and typical load and gearing will help steer the decision. A wot dyno run is not going to tell how a bike feels on the street. I posted one 117 that made 140+ and frankly with over 40 deg overlap it was snotty down low. Just like a hot rod car and high compression needing a little special care and feeding
There is a lot of wisdom in these statements. Then when you start diving into changing/porting heads and exhausts, things get even more complicated. I've learned my lesson about "rideability". I am on my third exhaust system and my current cam choice is questionable. The Feuling 574 is not crisp at the bottom like the stock SE-255 was and I kind of miss that feel even though I am making some pretty high WOT dyno numbers with minimal part changes. I continue to struggle with head selection with the 117ci kit. Everyone of course claims to have a better mouse trap and not so coincidentally they are all priced at $1800 a set. (R&R, FM, and Delkron, etc.) Even ordering HD raw head castings and have someone port them puts you right back at ~$1800. I am still really anxious hear Steve's report out on the GMR Headwork and GMR 600 cam with the 117ci kit on the other 117 kit thread.
p.s.
In my opinion, for those who have not installed the stock 117ci kit yet, using the thinner Cometic 0.030" thick head gasket with this 117ci kit is a $41.59 no-brainer for a tiny compression bump that can only help performance.
Thanks,
dnlpnd