As long as the x-over point isn't too low for the new
tweeters you'll be fine.
If the x-over point is too low you could cause damage to
your new tweeters.
Just look for tweeters with about the same reccomended
x-over freq as your current tweeters and you should be fine.
If you have the means to power an additional tweeter.
After you get your new tweeters. Take your old tweeter that was
still good and dash mount it to raise the soundstage. You could
use one of the x-overs that come with your new tweeter on the
Just an idea.
Pioneer 8600 - Profile Amp-Infinity Speakers - L7 Subwoofer