I am Not a big fan of mechanicals, but if I were going to shoot one the Rage would be on my short list. The most devastating broadhead I have ever killed Game with was the Rocket Mini Blaster 4L It was a 4 blade mechanical with a 1 3/4" cut. They were pretty much one shot heads, but they did some Awesome damage.
Broadheads are much better quality than they were a few years ago. There are several I would have total confidence in, especially Slick Tricks, G5 Strikers, and any NAP broadhead.
I prefer a 4 blade head because obviously they will do more cutting. I have shot Slick Tricks since 03 and the Grizz Trick model the last 2 years. I don't remember the last time I had to blood trail an animal.
If you put a Sharp broadhead in the boiler room they are dead on their feet whether they know it or not, and will rarely make it very far unless the shot was off the mark. A Bad shot is always a Bad shot and a good shot is a dead animal in short order.
Dan