Thruster BXR has 3 different weights, 5u, 4u and 3u. If you think 5u or 4u is too light, I think 3u is plenty heavy. While BXR's frame profile is slimmer than the traditional box frame, it is still stable enough to transfer energy efficiently to the shuttle. BXR has a relatively stiffer shaft than most of the rackets on market, you will need good technique and power to bend it in your swing, without the bend there's no catapult effect, therefore no "power". There is no "powerful racket", only a "good enough" player to utilize the power of a racket. Objectively, the only difference I can make between BXR and 90k is - BXR is stiffer, heavier and slower. Subjectively, at the same weight, 90k requires less back swing and BXR is quite a pain to play with in doubles. But for those who prefers a steadily paced singles game, or a doubles backcourt "smasher" who never goes to the front, BXR is a good choice.