I'm just wondering what cheaper units you might be talking about?lolLots of good stuff here. Got my Harman almost six years ago even though I have ten acres of wood to draw on. Not sorry. Can vouch for the problems my friends have had with cheaper units. My Harman sold a few replacements for sure. Go with the 68. As someone said the throttling capacity is great and your winters are cold! As for the pad just follow the mfgr recommendations. Easier to get insurance if you plan to tell Flo or the Lizzard you got a pellet stove. No matter what you're gonna love it. I kept my oil for backup and bedroom heat on cold nights (It's zoned.) but the next purchase will be a Harman pellet boiler in tandem with the oil. I'm sold on the relianility and capabilities of the brand and the economy of pellets. Now all you need to do is find a reliable supply of good pellets and enjoy!