I'm not sure where we will be going, but as it seems like either
ORD-LAS-HNL-(With Aloha B-732 on to) KOA
or
Florida+Keys and perhaps the Bahamas (With Bahamas Air B-732)

So the B-732 shouldn't be the big problem.

As the plans are not to far grown and my girlfriend as a vote too we are still in process of deciding where to go...!
She is also voting for Thailand, so we will wait and see if the USA will win the race.

Thank you very much for your input so far! ^

If anybody has something to add, just post it!

Greetings.
PS: A-300 is no problem as Lufthansa is using them a lot between Hamburg and Frankfurt