Bulls, buying or selling during the offseason?

Will the Chicago Bulls be a buying team or will they be a selling team in the off season? Well from what it looks like now, the bulls will be 50/50. And what I mean by that is they will be selling and buying in the offseason. Right now according to ESPN and the NBA the Bulls are looking for a high quality player that can take over for Pau Gasol. There options are, Dwight Powell who is an Athletic all around power forward. There second option is to be aggressive at signing Atlanta Hawks center Al Hortford. If the Bulls want to be a better team next year they have to be way more aggressive next year than they did next year. Especially Fred Hoiberg. Fred needs to step up his ISO and defensive formation plays. When the bulls signed Hoiberg last offseason he specifically said "I am a defensive specialist." Honestly it didn't look like the bulls defense was good this year. They need to step it up.