Thoughts from those of you that have an "undersized" stove?

I just bought a home with an open fireplace that I would really like to put a wood stove in. I live in a large metro area and my home is currently heated with a high efficiency natural gas furnace. My desire for a woodstove is 50% that I just want to have one because I grew up with one and really enjoy them. The look, the feel, the process of starting and maintaining a fire, etc. The other half is that I would like to save some money in the long term on heating bills. Having a source of heat during (infrequent) power outages is also a bonus.

Anyways, I am looking at the Cubic-mini Grizzley because:

1) They look great in my opinion. The overall aesthetic and the size is just so friggin cute to me. 2) Low cost. They seem to be a reputable brand that performs well without breaking the bank at <$800. Comparing to a the smallest Pacific Energy stoves (which are significantly larger) running closer to $4k. 3) 18,000 BTU sounds like plenty of heat to me. So many homes I've visited with woodstove are overheated to like 80°F and I don't want or need that. That amount of BTUs converts to about 3.5 1500w space heaters which seems well within the ballpark of handling a large portion of my heating needs in 1400sqft. With the gas furnace picking up any slack.
4) I don't plan on buying much, if any, wood. I recently got a pickup and look forward to finding free wood on Craigslist and on the roadside. And I also have 10 acres of rural property shared with friends that is a decent source. I'd be cutting it myself anyways and can cut to appropriate lengths for the small stove.

All that said, what am I overlooking or what do people regret after installing a small stove? Also, looking for recommendations for smaller well built stoves that are between the size of the Cubic Grizzly and the smallest Pacific Energy stoves. A deeper stove is one reason I would consider going larger just so that I could fit standard 16" logs in without having to cut them down.