What are your thoughts on them? Have you tested any?
I've hit the top end of the Vapor Speeds, Mizuno H5's, and Big Bertha's...not a fan personally. Especially with the Big Bertha's, the head of the club because of the design is just too big for my liking. Having a bigger top line/bigger head may provide confidence to some, but for me it almost does the opposite. The Vapor Speed's don't necessarily feel or sound hollow to me, but again, the heads a little big for my taste. If I don't like what I'm looking at behind the ball, I won't be able to hit it very well.