In my frank opinion, Saxon Math sucks at developing math ability, and you shouldn't short your daughter on that despite difficulties with arithmetic. You can add extra practice to any program. Have you looked at Singapore Math? I know I sound like a one-trick pony, but I've actually evaluated Saxon Math and it is inferior. Singapore Math also has a consistent layout. I also recommend taking a look at Math Mammoth (a silly name for a decent program)-- it's also better than Saxon and offers a consistent layout.
But they're all better than Everyday Math in my opinion-- well, maybe it's a wash with Saxon Math.