In my opinion, dedicated cans are the way to go. Sucks and is expensive, but there it is. Versatile cans are neat but my Omega and Saker can be difficult/hassling to reconfigure and as such remain in their flat end cap/keymo setup. Especially since you are considering keeping the can on one rifle.

I run a Surefire mini on my primary p/w 14" to keep the overall length and weight down