Thanks guys. That occasional pause you are getting usually happens when you've been orbiting at a GPU-bound level of detail, then pause for a bit. After a little pause, SketchUp will kick off a full detail (typically CPU-bound) render frame and you can not start working until that is finished. It can be very annoying and we're working on making that frame interruptible, but we're not there yet. The workaround is to use a GPU-bound style when you are modeling. That means no profile edges, sketchy edges, etc.
Keep the feedback coming.
Thanks,
Tyler