Sometimes you just have to pull the trigger.
Your google foo will tell you only so much, and that will only give you a string of anecdotes. Be your own data point.
Rick
Lectron Data Point
And you guys actually notice a difference with these over a stock aluminum bar???
It depends on what you are looking for! The flex will help those plagued by wrist/elbow/shoulder pain and/or fatigue for what reason ever (mostly due to previous injuries probably) and it will help you save energy you don't waste on absorbing many of the hits stiff bars will transfer to your body. So if you don't need either it is probably a waste of money.
Regarding the handguards if you are running full wrap-around ones you need their setup due to the loads on the bar ends. I prefer open handguards with solid bar ends to protect the grips and bar ends. Just tapped the bar ends with a M10x1.25 fine thread (yes, directly into the CF) and directly mount some custom made solid bar ends. Holds up just fine.
Michael
Sometimes you just have to pull the trigger.
I felt most comfortable running my FlexxBars with the red (stock) or black elastomers as the softer ones (blue, yellow) felt to "flexy" for me. To be on the safe side I choose the 2x flex level (bar bend 3) with the TE CF bars and have been extremely happy. The comfort is amazing even in comparison to the FlexxBars. I don't feel any flex at all when riding and the comfort the 2x flex provides is anything I'd ever need. Faster B-level offroad and extreme enduro racing.
Michael
As I run a Scott stabilizer under the bar in my custom made bracket, I guess the "KTM low" (profile 3) would be the most suitable? Right now, I run a OEM Gasgas Hebo(?) bar, but it becomes quite high using my stabilizer mount.