The other consideration with boxers is American or English.
American are a bit smaller and more refined. They generally have better confomation, and are sometimes called 'dry mouth' as they dont slobber everywhere like the English tend to. IMO, they are a bit prettier, and have a really nice looking face.
English are A bit bigger, boofier, and tend to slobber a bit. (or ALOT!!!)
We have had both, and they are both great in their own way.
We have noticed tho, that the Elglish tend to age a bit quicker. Thats the only thing with boxers, they arnt terribly long lived, and often, tumors are the cause of death.
There are also bob tails to consider, which come from an english line, with a touch of corgi a few generations back.
They were mixed with a line of corgi which carried a short tail gene.
They were then bred to retain the boxer looks, but keep the short tail.
They are becoming popular among boxer owners who have become accustomed to the docked look.
The problem with these are the price tag. Boxberry, the kennel that imported them, charge $1500 for a desexed pup. (entire animals are not available thru them)