http://www.nikonchat.com/50mm-f1-8-nikkor-lens/

Help me decide on a target.?
Trip of a variety of things .. Fashion photography, nature, the artistic type of photos .. I like the look of 20mm HSM lens Sigma 10-La, But I like the Nikkor 50mm f1.8 lens .. I have a d40, although I would have to manually focus the lens Nikkor .. IS there a middle? What do you suggest .. (Think 500 dollar range) I really appreciate it .. Sometimes I feel I will get the d80 so you can use more AF lenses with my d40 ..
18 to 70 suits him best, his angular range for close to 70 mm for standard shots, manual focus is better general