The higher the number, the louder and brighter the piece will play (The number refers to the distance between the tip of the reed and the tip of the mouthpiece when the reed is properly secured to the mpc). However, you will have to use softer reeds as the numbers get higher. Dukoffs are bright. They also respond poorly, are not reed friendly, are difficult to play low notes on, dont play quietly, and have wicked intonation problems as the higher the note goes, the sharper the note gets. You might want to try a Vandoren Jumbo Java or a V16 with a large tip opening (8A or 9A). If you can afford to spend more, SR Techs and Guardalas are great pieces that play nice and bright (thats what you want, right?)