With the rising cap, this offseason is the time to overpay for a good player because within a year that deal becomes a bargain.
On the other hand, I don't like using big money to sign complimentary players and those are probably the only options available for the celtics this year. still, while you build around stars, that doesn't mean that you wait until you've signed a star to begin building the rest of the team. sometimes you have to take the talent when it's available. i could see a big contract going out to someone this year.