Buying a 3/4 ton truck is a wise choice and will give you options if you ever decide to go with a larger trailer.
I used a Hensley with our 29' Sunline, and they are a great hitch. But, I think an Equalizer or Reese Dual Cam will work fine with a 27' Airstream and cost a lot less.
As to trailer options, AC should be a must. Aside from that, I would think most Airstreams will be well equipped with microwave, stove, fridge, etc.
I understand the appeal of a Airstream trailer and they are really nice, but when I look at the floorplan of the 27 footer you are considering, I don't see where it is the best plan for camping with two kids. Having camped with two kids, it's much easier to have beds for everyone and not having to set up/break down beds each day. Have you looked at other possibilities either in the Airstream line or considered buying a different brand? Just make sure you've really thought about how you will camp and what will make it an enjoyable experience. There are a lot of trailers out there that would give you bunks for the kids and a bed for you and your spouse. Just a suggestion.....
Good luck in your search and I hope you're out camping real soon!
