IS Boxer has a bunch of very nice boxing options.
I'd recommend it, for the entirety of the package.

If you're looking specifically for extended macros and are otherwise happy with your software...
Not sure its worth switching just for the macros.

The support is good and the features aren't matched elsewhere.
Although HKN has a lot of them.
If you have a specific issue with IS Boxer, make a thread here or on www.isboxer.com
Or ask in the IRC.