If you are looking for the biggest non-cat burn box available why not look at the Enerzone 3.4? 3.4 Cubic FT of space accommodates logs up to 22". Rated at 100,000 BTU with a fantastic heat exchanger (dont believe me, check it out on the web site or at the dealer). It is built like a tank with 5/16" steel (i know I had to lug it around a few times (500Lbs) ) comes standard with the blower and ash pan. It also comes with one of the best warranty on the market, Limited Lifetime including the glass and tubes. It uses heavy duty refractory bricks as well as the new C Cast baffle. With all of these benefits it typically retails for less than many well known brand.
You can get more info here
http://enerzone-intl.com/product.aspx?CategoId=1&Id=443 and also find a dealer near you.
If you are looking to save some money, the Drolet HT-2000 is a very similar burn box and available at many Home Centres and Internet retailers. Just google HT-2000 Stove and you'll find something in your area or go to
www.drolet.ca for more info.
You can see it burning here
http://www.youtube.com/watch?v=RZsesmpd3SQ
As others mentioned you may be better served with a central air wood burning furnace such as the Caddy line.
http://www.psg-distribution.com/
Since I work for the company that make these brands I come in this conversation with a natural bias. However, I don't think you will be disappointed with any of the models you are looking at. Ultimately, you will have to look at your budget, the look you like and determine what is the best value for your budget.