I've got a Yonex VT80, Z-Force, Li-Ning N90, N90-II, Victor BRS15 and SW30. Between these, I'm for the N90 if you're going for a high attack speed. You'll need some technique to get used to the racket, but its attack is the most explosive out of those that I've listed. The Z-Force is a monster, but it's a little harder to use than the N90 in my opinion; opens you up to less accuracy both in defense and attack. The VT80 is the easiest to use, with the BRS15 the fastest. Hope this helps! I've also written reviews of some of the rackets on the blog.