Thanks all for the feedback. I do prefer above ground and sightseeing. I'll use the Skyliner and go to Ueno instead, and like the idea of the Tokyo Tower picture too.
Just a clarification, am I able to pay the train/monorail fares with an international CC? Otherwise, I can withdraw some Yen from an ATM and use that.
For the Skyliner, do you recommend pre-purchasing the ticket online? Can they be used on a later train ride in case there is a flight delay?