Colon tours

My DH and I are trying to decided between the following tours in Colon. Please help:

Two coasts-dome train

Gamboa aerial tram.

Also we were thinking of the Chargres River tour but we are taking basically the same kind of river tour in Puerto Limon with Oscar Brown. I'm new to the boards, so any help you can give will be appreciated.:)

8/99 Celebrity-Mercury Alaska

9/01 Princess-Crown Princess Scandinavia/Russia

1/05 Celebrity-Constellation W.Carribean

10/05 Norwegian-Pride of America Hawaii (our 40th ann.)

1/07 Celebrity-Constellation Panama Canal

I did the 2 coast by train and it was AWESOME! Feel free to ask any questions......