Nytro would probably be enough power for you. Will keep up to anything, zero to 90. Major torque and low end pull. The problem with this sled is, it's very, very stiff. But if you ride a Dragon, a natural comparison IMO would be a Nytro. I was hot on a Dragon at one point, but was told by a very knowledgable salesmen that unless I was hammering trails with bumps and moguls, the Dragon would be too stiff for me. Same would be true of the Nytro. Plus, this sled, from all accounts, is extremely cold without the highest windshield you can buy. When you put the high windshield on it, it looks very weird. I almost bought one setup this way, and bottom line, I couldn't pull the trigger. Just not the sled for me.
Also, clearly the Nytro will be a much more difficult resale 3, 4 years down the road. Very limited market to sell into - low demand equals difficult sale. JMO
Based on what you've described, an Apex will serve you very well, but get ready to ante up a pretty hefty price. I think they are nuts with their prices on these things, but you can probably do pretty good in the off season on a left over 2011.