I'm to a point where I'm interested in getting a new lens. Right now I'm using the Canon 55mm kit lens. I'm looking for something that can give me a sharp focus. I've researched and see that some photographers use Canon's 50mm 1.8 or 1.4...would that be much different than what I'm using? Also what about the 85mm 1.8? I'm kinda married to my zoom lens, would I get used to a prime? Looking to spend anything around $400-$500. Any kind of feedback would be great! Thanks!