I can't really find anything bad to say about the 18-105. Sure, it's not a fast lens, but that's written in the specs. It's not going to take a lot of hard knocks, but you really wouldn't expect that. I think you need to spend a lot more money to cover the same range with better quality.
Check
Thom Hogan's review if you don't trust me.
I certainly wouldn't consider any 18-200/250/270 lens likely to be better optically than the 18-105. There might be a convenience element...
I've considered the 16-85, but can't really justify the price. As for the 17-55...
Chris