I prefer the deep drops, you can get in a better aero position while still having the tops to use as risers/flat bars. They simulate having drops and hoods and those are one of the most versatile setups you can have.

I orignally wanted the Nitto 009s but got the 21s instead and they work great for in the saddle climbing.

Originally I wanted the Syntace Stratos 800 but couldn't find them anywhere for a reasonable price.