I bought myself a fairly cheap 20 key (C/G) Anglo some months ago and am getting to grips with it in my not so copious free time. I've played harmonica for many years so the push/pull note pattern's not totally unfamiliar. However, I could so with a little advice as to whether there are any decent tutorials (books) that experts could recommend. I'm pretty good at playing tunes on most instruments by ear, but some good advice on the use of the bellows and the air valve would be appreciated.

Like many beginner instruments of this type, the buttons are also rather large. Once I think I've become a little more proficient, what middle-price models would you recommend? (If there are any, that is).