I love my Regency I2400 insert, but there a a few good ones out there. Which ever brand you go with do the full length stainless 6" liner right up the chimney, your draft will be better and the stove will work to its full potential, a little money spent up front will give you a big smile
in the long run. What ever you do get a insert that comes with a blower as an option, the inserts sit so far in the fire place they really need the blower to force the heat around the insert and back out in the room, you won't need that blower all the time but when the temp drops its a must have. They dont use much power at all, I run mine 24/7 mostly on high(when its really cold) and it only draws about 75W, I hardly notice it on the electric bill. I put my insert in three years ago to try to help with heating costs and I ended up heating the whole house with it ending my oil heat use, I heat about 1300sq ft and DO NOT ever need to turn my thermostsat on, it was 13F last week, I have leaky old windows and the insert kept the house 68 no problem, next spring I get new windows and can't wiat to see the differance. When the temps come up to 25F and above the house will actually get to hot and I will have to turn the fan down or off. You'll love an insert and the money it will save.
1. get the blower if its an option (its better to have and not need than need and not have)
2. full 6"stainless liner
I would recomend these two things to anyone looking to put an insrt in their house. Money well spent. Good luck Jon