You can get a paintable finish on your speakers with eggshell white grills and they should blend in with your wall color very well. The full metal bracket will make the speaker stick out quite a bit more than just using the flush mounted bracket that comes with the speakers and placing them as suggested (a couple feet behind and above ear level in the sweet spot). Also, there is an article on the website (can't find it right now) about painting the grills to make them blend it even better. I can't remember if you need special grills to do it or what, but you can probably contact Axiom and they will know.
If you were able to paint the entire speaker and grill in the exact same color as the wall then the flush mount should make it so that you (or better yet your spouse) really don't even notice them.
