I am 6'0 230 pounds and was debating on getting a 186 or 191 Jeff 110. I ended up going with the 191, mounted at +1 from recommended and they have been amazing. Super stable and they absolutely blast through chop. I am coming from a 186 Magnus 102 mounted dead center, and there was almost no adjustment period for me.
If you were done growing, I would say get the 186. However given that you will keep growing, I would recommend getting the 191. They might feel a tad long at first, but you will get used to it within a day or two of riding.