That really depends on what you are looking for, but one of the best current racket companies right now is Li-Ning which actually sponsors the whole Chinese National Team and then there's Wilson and Yonex rackets such as the K-Factors for Wilson.
Wilson.
the best racket to improve strength is 1.babolat 2.wilson 3.head
When we touch the grip it should be thick and soft and grippy. The best grip company i know are Babolat, Head, Wilson.
Speed and Balance??? GO FOR ONE OF THE YONEX NANOSPEED RACKET SERIES!!! They are PERFECT...
There is no best tennis racket in the world. All tennis rackets have different abilities and technology. What I think is a good tennis racket is the Babolat Aero GT's and Wilson BLX's, they have a really good technology such as the cortex system and the GT technology.
Qui est le plus compétant ?
i dont no
i need abut gain est have problem
This is a good question I think. No racket is best but excellent racket there is many. Yonex voltric series for attack. Arcsaber series for all round. Nano speed for defensive or more front court player.
Better for what? The best language is simply whichever language works for you and let's you get the things done. Common Lisp is certainly more mature than Racket, but Racket's language design is cleaner and has widespread community support. However, Racket lacks certain features such polymorphism. Try both languages, that's the only way to really determine which is better. That is; which is best for you, personally.
Best.
The Yonex Carbonex 21 in my opinion. :)