Replying to Mountain biking...

Okay it's the off season now... maybe not for a lucky few. I was skiing From early Dec. Until my last day on April 28th this year. This is the longest season I have ever had. But now, I am trying to figure out what I am gonna do until next Dec. How good is mountain biking for cross training for skiing, and all around fun for a summer sport. I haven't really done it before. But I live at the bottom of my resort, and they have some of the best downhill around. And there are tones of just regular trails around here too. It looks like it would be fun as hell, and I figure it would keep my legs in top shape for next season. What is the verdict? Am I pretty much on point with my opinions here.

And also, I have never bought a bike before, so this would be my first one. I want it to be rugged enough to be able to handle downhill, and not break everytime. But I also want it to be decent for trail riding and stuff too. What are some bikes that i should look at?

Would the Kona stinky would be a good choice? I am looking to spend somewhere around $2500 cdn. If I go ahead with this... I should be able to get some decent hook ups from my local shops too.

What are your thoughts guys?
Thanks!