For your 'no fuss' option, personally I'd opt for the Montana just because of its larger screen Ted.
The 62S is fine on a bike too but the screen is obviously harder to read due to its size when mounted.
My personal preference is to ride on the compass page with the CDI so it's not so much of an issue but I confess that the Montana screen is easier for tired eyes and when bouncing around too.
The 62S is my backup and 'walkabout' unit- being smaller & more discreet, making tracks in unknown towns helping to track-back to tent/hole-in-the-ground/dog shed/ or B&B !!
The Montana has been designed to work with BaseCamp and not MapSource although it will work with that one but it will cause issues like way point duplication etc in Montana.
Last edited by Bertrand; 6 Nov 2011 at 11:16.