Well, I wouldn't replace the tweeters unless it was an upgrade.All standard rules would apply, including reworking the crossover.
Erik, you are comparing each to a "pair". You need to be comparing 320.00/pr to the 310.00/pr he mentioned. Even if it can be done for 260.00/pr, thats not a huge difference by any stretch of the imagination.
No, I am comparing them to what they cost EACH. His original post stated:
"But I cant afford the $310 for the tweeter rebuild."
Very easy to read that as $310 EACH, as he never stated it was for a pair. Again, I just want to make sure there is accurate information out there for anyone who is looking at undertaking this project.