I am thinking about a new insert for next year. My Avalon has done a fine job and I have very few complaints about it. I am interested in getting long burn times and everything I have read says that a Cat stove is better than a secondary air stove. I've done some looking into the hybrid insert which Avalon sells but the burn times don't appear to be any longer than my current stove. Are there any options for a new insert with LONG burn times besides a BK princess.