Bambam, in answer to a couple of your questions, especially the Otto Link metal question:
I thought the same as you, must be a "so and so didn't like them, so they must not be very good" It's not that I think they are bad mouthpieces, they aren't, they are very good mouthpieces, but mouthpieces are like shoes, if it doesn't feel good, you aren't going to use it, right? So I tried several different facings of the metal Otto Link and it just doesn't feel good to me, I like the hard rubber mouthpieces in general for alto, but that's a personal preference, in fact, I have tried lots of metal alto mouthpieces and I don't like ANY of them for my alto. On the other hand, for jazz on tenor AND soprano, I prefer metal, go figure. Don't ever let anyone tell YOU what YOU should be using for equipment. What matters is that you're using the equipment that feels good to YOU, sounds good to YOU, and that YOU sound good on. Notice the emphasis on YOU, there aren't many things in life where it's all about YOU, but this is one of them. As for hitting a plateau, don't be discouraged, that happens, just keep playing through it. If you're really looking into blues progressions and learning jazz tunes, especially standards and getting around the ii-V7-I turn around, check out the Jamey Aebersold series of CD's. It's a series of CD's combined with books that he has put together that have a recorded live rhythm section background with all of the proper chord changes, some aren't in the "proper" key, but I won't get into that. The point is, for a one man band trying to really learn to develop or re-deveop and ear and that doesn't have access to a jazz combo, these CD's are great! They are $15-$20 a piece, which includes a CD and a corresponding book. I would highly recommend getting the "Nothin' but Blues", "Blues in All Twelve Keys", and the "ii-V7-I Progression in All Twelve Keys" sets to start with, plus another CD that has some of your favorite songs on it to play for your own enjoyment. Just google "Jamey Aebersold" and you should get thousands of hits. Compare prices and order what you want, they usually tell you what songs are on each CD. I've blabbed long enough, keep playing and enjoy! BTW, I got my Mark VI for under $3000, you could get one too, but that gold-plated Buescher is gorgeous! It's not the name, it's your satisfaction that counts!
Selmer
PS: Feel free to email me about any other questions.
Two great books, "The Jazz Language" by Dan Haerle and "Patterns for Jazz" by Jerry Coker, great for learning about the language and gaining technical facility around the horn.