it really depends on the subject matter you are going to be using it for, no lens is necessarily "better" than another, just different, of course if you get specific there are pros and cons to specific lenses but the actual type of lens you want changes the answer to this question.
so, what are you looking for?
>fisheye
>telephoto
>macro
>etc
there are others aswel such as ultra zoom, medium zoom, wide angle, short and medium telephoto
my advice to you is to google the prices and types of lenses you want and then come back here and we may or may not be able to help you out