I'm sure others might disagree, but in-wall speakers are not the greatest for the money. I understand their typical markup is 200%. You might look at a very small sub-satellite set up such as the Totem dreamcatcher system or the one from Focal JM Labs. Both sound very nice. Alternatively, I've heard good things about orb audio speakers (sold online only) which are cheap. For an amp nothing will be that great for $400 new.
Plan B. In a room that small, I'd almost be inclined to skip the 5 channel since there are issues with your centre anyway. You will likely enjoy a better quality 2 channel integrated amp and a decent set of speakers (with a small sub). The NAD stuff or a Rega brio would fit the bill. See above for speaker recos.
Plan B. In a room that small, I'd almost be inclined to skip the 5 channel since there are issues with your centre anyway. You will likely enjoy a better quality 2 channel integrated amp and a decent set of speakers (with a small sub). The NAD stuff or a Rega brio would fit the bill. See above for speaker recos.