Originally Posted by trickg

My question to you is this: Who's sound concept are you playing towards, yours, or your teacher's?

If YOU like the way that it feels, blows, plays and sounds, screw your teacher. Who the heck is he to tell you that your sound doesn't have enough core? That's just his opinion. Your sound is your sound, and if YOU think it has enough core, go with it. The more you play on this mouthpiece, the better your sound is going to get on it. You can always work on your sound, but that work is going to be hampered if you don't have the right mouthpiece for the job. (Something I'm going to add here is that it is possible that your sound is a little thin on this mouthpiece and your teacher may in fact be right, but you really need to consider whether you want to sacrifice a little sound for playability.)

I say stick with the GR.