I have my 50 1.8 on my camera more than any other. I just zoom with my feet. If not that, then the 18-200.
That said, I really like the Nikkor 70-200 2.8 vr2 I used recently. The weight for me wasn't an issue. I used a blackrapid sport strap connected to the tripod foot and it was quite comfortable for a weekend walking around Circuit of the Americas. I can't currently justify owning it for 5-6 times a year use since I can rent it for 70 bucks, but that could change. We'll see.