Go with the 2-blade if you decide to use them. The three blade have weak ferules due to the machining. They are a devastating head though. Very good performance and I didn't experience any problems with the bands(breaking or replacing them).

I have shot a couple of deer and a hog with them. The performance was outstanding, except, on the hog I had 2 ferules break when they hit bone on the far side of the pig. I don't think that would be an issue with the 2-blade.If you look at the two heads the amount of material machined out for the blade grooves is substantially larger for the 3-blade.I wouldn't hesitate to use the 2-blade though.