Thanks everyone for the welcome and the responses. I guess I was worried they were being discontinued because they had some problem or were inferior.
From a conversation I had with an Axiom employee it sounds like the inwall/onwall combo provide a bit more low end then the standard on wall speakers. I'm coming from an old crummy $150 5.1 yamaha speaker set so I am not even sure I would hear the difference. The slightly better specs appealed to me, however if it is not something I would be likely to notice my wife would probably rather me not cut holes in the wall.
If the performance is a moot point it it has now turned into a question of whether we want to spend a bit more money to save my wife the anxiety attack she will have when I break out the drywall saw.
