Some questions you need to ask yourself is;
How good a paddle kayak does it need to be and how stable?
Will it be used for off shore only?
Are you attracted to the AI, (possible want for the future)?
The Outback, while it will fish offshore quite comfortably, I do not consider it a choice as it is a real sh!t to paddle any distance, if the Mirage breaks and you are offshore 8km (5 mile) with a head wind and a (censored) of a swell, You are going to do it bl##dy hard.
My choice would be either a Revo or Adventure. The only and I do mean only, thing I do not like about the Revo, is it has no keel, and therefore is not as an efficient as and Adventure to paddle.
The Revo you sit higher and a little dryer in the seat well, which is nice. Its shorter and a little easier to manage off the water and on the water. Personally I did not find much difference between the Revo and Adventure in stability, almost everyone else say the Revo is also more stable. Finally, the front hatch is a little easier to get to and the rest is pretty much the same.
IMHO the Adventure being so long and having a keel to help keep a more positive direction, makes it a fraction faster, and the keel is a great asset when you pull the paddle out for a go (big difference over the Revo). The Adventure is a wetter ride and you will find yourself sitting in water for 90% of the time. The best part of the Adventure is; it upgrades to an AI very easily.
Then you have something worth taking off shore