music editions

hi. my "teacher" told me that i should be careful when i buy music because i need to make sure that i have a trustworthy edition of that music. so, the point is, i'm interested in buying a copy of the weber concerto, and i'd like to know what is a good edition to buy?

thank you all.
-aj

yep. you want an urtext edition. if it even exists anymore. Urtext basically means the original without any extra markings by the editor. however i don't know which one you should get. sorry. ask the person who told you to be careful.