According to ESPN's Weekend Dime (scroll down to the middle of the page), Reinsdorf was willing to go into the luxury tax if the Bulls were able to land Gasol, and he's willing to do the same if we can get Howard. Quote below.

Sources with knowledge of Chicago's thinking told ESPN.com that Bulls chairman Jerry Reinsdorf was prepared last week to go into the luxury tax if necessary if a legit trade scenario involving Gasol had materialized.

Which suggests that the Bulls, if they're that high on Pau, are bound to try to trade for him again.

Nor have they abandoned hope of courting Dwight Howard via trade, sources said, despite Howard's longstanding coolness toward the idea of relocating to Chicago and the extra season he just committed to Orlando by opting in for the 2012-13 season.

This was a pleasant surprise to me ... if Reinsdorf is willing to go into the luxury tax, eventually we'll be able to add a top-tier talent via trade, given how many assets the Bulls have.