I've had final cut crash a few times, along with iMovie. So Mac is not the golden child everyone makes it out to be for reliability my windows system crashed just about as much as osx has. So pretty disappointed there.
OS X generally *is* the golden child we rave about. It sounds like you're referering to problems with a specific application (Final Cut), but that's not caused by OS X. If you are referring a system-wide crash requiring a hard power cycle, I would highly recommend pursuing that with Apple to find the cause as you may have a hardware stability issue.
In the 4 years I've owned my MacBook, I've had maybe 3-4 system wide crashes that whole time. While Windows 7 is indeed very solid, I still consider OS X a bit more stable.