I think you're over-reacting by selling the system and getting everything off of the floor. But that's not my place to change your mind. 30x45 is a lot of volume indeed. I agree that the NAD probably won't have the power to push MMG-Ws to fill that large of a space. How far back will you be sitting from the speakers? More than 10-12 feet?
Another option - You *can* wall mount some of the larger speakers, like the Magnepan MMG, which reach down to 50Hz, give or take. That would be "more full range" than the MMG-Ws. But depending on your SPL requirements wall mounting the next speaker up in the line might be a better bet. the MG-12/QR. or faiing that, it's forerunners the MG-0.5/qr or MG-0.6/QR. The frames of those speakers are a little less flimsy than the MMG or MMG-W, and as such are better suited to higher SPL duty.
You might also consider something with higher sensitivity, like a wall mounted horn or maybe a wall mounted Gallo Acoustics speaker (but the Gallos will need a sub).
One other thing you might consider if taking your existing digital and analong front ends, build from DIY bookshelf speakers with one of the Fostex drivers (inexpensive), and switching to some inexpensive tube-based SET components. You may find your bedroom may be the only place you'll get peace and quiet to relax to the rig, plus it will be out the children's way completely. I have a friend doing just that with his first baby on the way.
Another option - You *can* wall mount some of the larger speakers, like the Magnepan MMG, which reach down to 50Hz, give or take. That would be "more full range" than the MMG-Ws. But depending on your SPL requirements wall mounting the next speaker up in the line might be a better bet. the MG-12/QR. or faiing that, it's forerunners the MG-0.5/qr or MG-0.6/QR. The frames of those speakers are a little less flimsy than the MMG or MMG-W, and as such are better suited to higher SPL duty.
You might also consider something with higher sensitivity, like a wall mounted horn or maybe a wall mounted Gallo Acoustics speaker (but the Gallos will need a sub).
One other thing you might consider if taking your existing digital and analong front ends, build from DIY bookshelf speakers with one of the Fostex drivers (inexpensive), and switching to some inexpensive tube-based SET components. You may find your bedroom may be the only place you'll get peace and quiet to relax to the rig, plus it will be out the children's way completely. I have a friend doing just that with his first baby on the way.