I'm not sure why it's significant that you'll be moving to Hawaii with your bike--a road bike is a road bike, no matter where you go. If you think you'll want to ride on dirt roads and trails, you want to think about something other than a road bike.
Having said that, it sounds like you have some definite ideas of which bikes you're interested in, so my best advice is for you to go to a bike shop and try them all out--see which one feels best to you. It's a very personal decision.



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Of course that's it--gearing! If you're going to be climbing major hills, you want to think seriously about your gearing. As MDHillSlug pointed out, the gearing on most bikes can be changed, though it's not something I've done myself. You should definitely (1) learn a little bit about gearing, and (2) talk to the bike salesperson about getting the right gearing for you. (But first educate yourself so you won't be steered wrong by someone just trying to unload a particular bike.)