No matter what you buy be prepared to have to alter it again - it's all personal taste - I went through 3 sets of bars until I was happy.
I'd like to try some fatbars one day for no other reason than I really like the look! But I figure with the riser adaptor they may end up higher than I desire.
This is exactly the reason I went with Thar-bars. When I had my FZ6, i went through several bars trying to find one I liked. Never did, and ended up going back to stock.
When I saw thar-bars, I knew I'd rather spend $160 and get exactly what I wanted rather than waste more time trying bars that would not be exactly what I wanted.
With Thar-bars, I have them set for exactly what I want. If I want to change it later, I can. Are the infinitely adjustable, no. Are they the best bars on the market, for me yes.
I'm in the same boat. I've had Renthal Ultra Low's and a few similar bends on two different 919s. The first 919 saw a number of track days before it was totalled.
For everyday riding the ULs are 1000X better (for me) than the OEM bars, but they still wouldn't be the first choice for a track day. On my current 919 I have a custom setup and oversize bars. I've tried a ProTaper and a Renthal Fatbar on there (at almost $90 each) and still haven't found a perfect bend or width. I'm close, but still not quite there.
I plan to do a few track days this season and know that these bars will be less than ideal. Since I ride to work and ride to the track (both are within 30 minutes from my house), it would be great to have a comfortable bar set-up for my daily commute and a more aggressive set-up for track days.
Some may balk at the idea of spending $160 on a set of bars, but I could have bought at least 2 sets of Thar bars with the money I spent on bars for both 919s (at $60-$90 each), and I still don't have the "perfect" bend, and no way to adjust them.
I will definitely be considering these bars. I'd love to see a set with black bars and black clamps!!