I'm going to be spending roughly $1500 on a camera setup in the next few weeks and I'm not sure which route to take. I'm going to get a d90 body for sure and was going to get the tamron 17-50 2.8 for my first lens. Then I looked around a bit and found for not too much more I could get the nikon 28 2.8, 35 1.8 and 50 1.8. Would it be better to start off with the primes? They would force me to think about composition more than the zoom would. Or would it be too much of a pain in the ass to constantly switch the lenses? Thoughts?