I would also keep the 505 and get a 300 for on the road. Unfortunately for me, both don't provide the zoom and pan function the 600 has. Ok, this was kind of offtopic.
But I tote my readers around every day. Did it with my 505 and now do it with my 600. I have it in my messenger bag. I already dropped it several times, but display damage wasn't an issue so far. Sure I am carefull with all my gadgets ( I don't like them dented or scratched), but I think as long as you are carefull, you don't have to handle it like a raw egg
