Hi nuthead and welcome to the forum. When I was a kid we used to set the drag on the reel so the line wouldn't break in case we hooked into something larger than a Perch. Having to replace hook, line and sinker was pretty expensive for a kid. I'm not sure what you mean by drag in relation to kayaks. You Aussies seem to have some peculiar vocabulary, so I was hoping one of your mates would be able to answer that question.
Now, if you're talking about a fish dragging you around, you should look in to the MD 180 Drive -- it lets you go backwards when fighting the fish so it doesn't drag you all the way to Tasmania.
Regarding your other question, the Revolution 13 is faster and better in wind and chop (lower profile, finer bow and easier to control roll in cross swells. I think of the Outback as more of a flat water boat, although it handles reasonably well in the ocean also. the Revolution 16 is even faster and more seaworthy, but a little wetter. The Outback, being the widest, has the highest in initial stability, followed by the Revo 13 and finally the Revo 16. I consider all three quite stable.
