If you want to go mechanical and looking at rages, then go with the 2 blade. Stay away from the 3 blade, have read alot of posts and seen first hand the 3 blades failing to fully open.
I have shot the 2 blades for going on my 3rd season and am a big fan of em. For the record I've got a few arrows tipped with G5 Montec CS's in the quiver that are now reserved for critters...
On my wife's bow she has muzzy 4 blades on em, they shoot well for her and do their part.
Both BH's you'll find people either adamantly love or hate em. If you do your part by practicing, have your bow in tune, and BH Tune before hunting (just to name a few things) then the BH choice is insignificant.
While working at an archery shop we saw more customers win the lottery then have BH and field points shoot the same with no tuning needed by the customer. Mechanicals help reduce the discrepancy and are a easier to tune as a result, but BH tuning is still needed. It is very simple to do as well...