Wow. 3 year old bump
I had the original 24-120 lens about 10 years ago. Loved that lens. Not as sharp as others, but it did the job on my N90s. Never had the 18-200, but considering the range, you cant beat the versatility of the lens. Short of any pro work, it will cover about 90% of anything you would need. The other 10% being low light or where 200 is too short.