I currently have a Wilson nTour. I really like it, but I want a new racquet. I have been looking around and have found this DNX 9 that everyone has talked about. What I like about the nTour is its relatively low weight and swingweight. Do you guys that the 1 more of weight on the DNX 9 would affect me much? I ask because I don't want to be tired quickly. Also, I am thinking of the new TFight 320. Looks good, and similar to the others. What do you guys think? Thanks!