Braun is better than Wright. Teixeira not so much.
As for other 3bs...Cabrera is better. Longoria probably too (though he can't seem to stay on the field).
Headley had a great year in 2012..but hasn't done it long enough. His second best year OPS+ wise is worse than Wright's second worst.
And I'd take Wright over Beltre . Beltre has been really good the past couple years, but that's when he's gotten the opportunity to play in very good hitters parks. He's always been great defensively, but offensively outside of one big year in LA he was pretty meh overall in the 11+ years he played in more pitcher friendly parks in LA and Seattle . I wouldn't trust that he'd put up the same great numbers he put up in TEX/BOS while playing regularly in Citifield. Even with the last 3 years - his career OPS+ is only 112, which is worse than Wright's worst year.