Thanks for the answers.
Jhieminga, I am not traveling much any more so the spare battery would wait for the now.
FullOppositeRudder the point about one more thing to forget at the hotel is a strong one. Hopefully an ex taught me about a last look around so it won't happen.
Lantern10, my thoughts exactly but the Nikon was bulkier and did not have a WiFi which is something I consider useful. So the choice was made and a SONY was ordered.