[Vudoo4u2]

35mm=closest to 50mm on a D40 body (or most crop bodies)...50mm is a medium range distance which was popular as a prime focal length on film cameras.

18-55 is a kit lens, which is okay, its not bad, but not great...certainly nothing to write home about, but more than ok for someone starting out not looking to spend much on a lens...the 18-200 would be a much better lens...but its also more than the total amt you're looking to spend. The 18 end is "wide", but not too wide since a D40 is a crop sensor, wide gives you the ability to see a larger frame vs the 35 or 50, but likely adds some edge distortion

50mm is the longest choice of the bunch, and is probably an ideal portrait focal length, but for an everyday walk around on a crop sensor, it will be too long and will limit your frame if you have no other lenses.