I believe it would be harder to blow the crossover before the actual speaker. Unless you had a major event at your place, I don't think you blow both the woofer and the tweeter at the same time. Anything is possible though.
Follow Nicks troubleshooting advice. If it's one of the drivers, replacements may be hard to find.
Recommendations? BIG can of worms...
There are a ton. For passives, Event 20/20s come to mind.