i am going to buy my first dslr next week. i am told the nikon d90 and d300 are my best choices. i dont want to spend to much over 2 thousand. i thought about a used camera to start with , like on craigs list. but so many choices , cannon nikon d20 d30 d40 d80 d200 . i was told that the new d90 and d300 are really advanced. like from a carberator to fuel injecton was how it was described to me. so far only sales people have tried to help me. any input from a real person would realyy be good. im thinking about an 18x200 lense or around that size. thanks for your help .