Quality Camera Lenses Sharp, Fast, Inexpensive Good Camera Lenses? (10 Points!!)?

Good Camera Lenses? (10 points!!)? - quality camera lenses sharp, fast, inexpensive

I'll buy a Canon XSi, and I want to know me a couple of good lenses.

Basically, I need clarity and image quality. It is for photography in general.

Thanks and 10 points to best answer!