don't know what your $$$ situation is but the 120 hr class is not cheap (to me) so make sure it is something that will work for you and what you want to do. I am thinking those are ambitious flying dreams for a kitfox (but look at what the flying pioneers did) If you deck out a kitfox (read make it heavy) it will not be the super STOL plane you might think it is, so keep that in mind with what you are wanting to do with it. I think the 7 may be more what you are looking for than the model 4 I am wanting. This site is a wealth of information so I suggest you spend some time searching and asking questions before you drop money. going from the bahamas to alaska is a LONG trip in a plane pushing maybe 100kts especially with a headwind in the 30-40 kt speed at oxygen alt. If you go with a 3-4 doubt you will see 100kts anyway so think even slower. Not that it wouldn't make for heck of a story and if you aren't in a hurry to get there why not do it that way. If you are interested perhaps you could rent a 150 and take it on a long trip to see if you are interested in that ( different but similar size cockpits) probably slightly faster cruise speed but close enough to give you an idea of what you might be dealing with.