Whenever I was looking at getting one I looked at Yankee Hill hard, but in the end I decided to go with the Diligent Defense Enticer L.
My number one priority when picking out a suppressor was noise reduction. Since I shoot off tripods I didn't really care about the length or weight. The Enticer L is right up there with the high dollar suppressors whenever it comes to noise reduction, but it's a lot cheaper since it's stainless. It is a 30cal suppressor, but you can change the end caps just like the Dead Air suppressors. It came with a 30, but I am going to order a 6.5.
Right now I have it on a 22'' Ruger American Predator 6.5cm and I am very impressed with it. Actually, more impressed than I thought I would be.