You've said skis that do all different things. The Nordicas are more for racing/high performance on groomers. there more stiff then most skis and can handle quick turns. The mantras are full twin tips and are very wide under foot which is good for powder and some park skiing. The Rossignol avengers are an SUV type ski that can do all theses things well but does not exceed in any category. To find a high-pro ski you need to get more and more specific in what you do most with your ski. I suggest going to skis.com and checking out some of the videos in the library.