http://www.youtube.com/watch?v=drkpOTJQOQk

You don’t have to go too far. Broly apparently did this in his base form ( as opposed to his LSSJ form ). I can’t remember, but I think Buu was also stated to destroy a galaxy ( though he probably did it gradually ). Though keep in mind Broly is a movie character.

http://www.youtube.com/watch?v=_Mx_-3ZIksw&feature=related
( 2:00 – 2:15 )
http://www.youtube.com/watch?v=wSsTnX3WCSg&feature=related
( 8:00 + )

Super Buu have shown twice the ability to rip dimensions by screaming. By releasing all his energy, he is said to be able to destroy the entire universe.
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Though you do bring up a good point with the centerpoint station. Too destroy Kid Buu, you need to blow apart his atoms, something the force of a star moving at near lights speeds should be able to accomplish.

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AHEM -”Yeah, in a duel that’s pretty much inevitable, but it gives the SW universe hope in a Kid Buu vs. Star Wars type of thought.”

I’m willing to accept the Centerpoint Station and the Suncrusher can destroy Buu if it hit him, but it still would be very difficult to catch him with those weapons.

I don’t have any doubt that the destruction of two solar systems (and all the nuclear energy contained therein) would destroy every atom in Buu’s body. You have a good point that one would have to hit him true. But even when face with Goku SS3’s ultimate attack he didn’t jump ship, and that attack was coming many episodes in advance. A solar system in hyperspace is many times more sudden than the speed of light, faster than the movement of the Spirit Bomb. I don’t think Buu is any pushover, but the destruction Centerpoint creates seems unfathomable. I haven’t seen DB GT, but as of yet, I haven’t seen that amount of destruction at one time in the rest of the GB universe.