Hello. I am new to the wood insert market and looking to purchase a large wood insert to help bring down my propane heating bills. I have started to focus on the Osburn 3500 and the Hearthstone GMi90. Any thoughts on these two choices? The GMi90 does not seem to be as efficient but it’s a nice looking product And seems to be available. I am up for doing additional research so if there are other models I should consider, pointing me in the right direction would be appreciated. Thanks - Insert Newcomer.