Hi James,

Sorry I just go to this (Hello from Disney!). The D3100 is absolutely more compact. I call it a P&S on steroids.

I'm using the 70-300 and the 24-70 on this trip, and the lenses take up the room, not the camera. I choose at the start of each day which lens I want to use that day, but with the 28-300, that choice would be unnecessary for the way I'm using the camera.

I think the perfect combination for a "pocket camera" would be the D3100 and the new 28-300. I've played with the lens some, but couldn't justify it ahead of this trip.

If I keep the camera (and probably even if I don't) I'll eventually add the 28-300 as a walk about lens.