Best boiler stove? Henley, Waterford Stanley, Charnwood, other?

Hi,

I need a boiler stove to heat a large badly insulated room (in an old stone cottage) and power 7-9 radiators. I'm wondering what stove would best suit my requirements?

Putting the dimensions into the Waterford Stanley site (7.6 x 4.1 x 2.8 metres), it states I need 7kw output. But the stove is in the centre of the room and I don't want to melt us when we're sitting in front of it either! There are 2 rads at the other (non fire facing) end also.

Any advice on what stove would be the best fit? Waterford Stanley Erin? Henley Blasket / Tolka / Druid? Charnwood? Other? Looking for efficient heating and value for money

Would really appreciate any advice as I can't find reviews anywhere.

Thanks in advance