Welcome to the forum! I went back in forth for a few weeks trying to decide between these models as well. I ended up purchasing the Ironwood 650 for the reasons @CampWhatnot mentioned above.. I tend to keep things for a while, so I figured I might as well spend more up front and hopefully it would last longer. I know it's minor, but I really like the fact that you can adjust the lower shelf depending on what you are cooking. For me the Ironwood gave me most of the features I wanted in the Timberline, but at a much lower cost. If you have any other questions before you buy, be sure to ask!I'm in the market to purchase my first traeger. I'm trying to decide between the pro 575 or the ironwood 650. Any suggestions?