bamboo flute

Hi there! I'm new here. I'm from Argentina and a good piano man. I also have others instruments. But now I want to ask about my Quena. I bought it in North-Argentina in my vacations trip. So, now I want to learn how to play it and it was going good. But the problems started when I wanted to go...

I've tried a few bamboo flutes at renaissance fairs, but have not been impressed. I see some good looking ones on worldwindsmusic.com & eriktheflutemaker, etc. What would you suggest?