When you read the dpreview boards in depth, go to the pro boards and look for the posts where they havebought point and shoot cameras to use when they don't want to lug their big cameras. You will get some interesting points of view. It was what helped me decide on my S80 - although I do know that is not long enough for you.

VOYAGER:
MC to FLL 11/07
MC/Dover 6/06
MARINER:
BCN / Ven 10/11
Alaska 2001|2006
Panama Canal 2003
NAV
Caribbean 11/06
Bermuda|New Eng/Canada 6/04
PG 5/05
OCEANIA
Nautica |Ist/Athens 6/07
Regatta|Baltics 6/08
Riviera 2013 Crossing -Istanbul to Miami