We are looking to upgrade to an insert with a higher BTU output. The shop we frequent recommended the new (and not out yet) Hearthstone Clydesdale. I have no experience with Hearthstone and am having a hard time researching to see if the smaller one is decent as the clydesdale is apparently an upgraded and slightly larger version of the one in the showroom (can't recall the name of the showroom model). Anyone have any knowledge or advice?