I had an '08 Apex with the MCX 270 turbo kit on it and absolutely loved it! Heavier - for sure, but what I found is once I learned to ride it (e.g. carry speed and use power proactively) I got stuck a lot less than before on my 900 King Cat. When you are stuck though you do get a workout. The motor was fantastic and was very easy on belts. Generally just turn the key and go. I think the RX-1's can be more finicky. I am not sure what all the differences are on a RX-1 vs an Apex but suggest going newer if possible. My buddy had the same sled but was only about 155 lbs and he really struggled. I'm 225 lbs so had a little more "ballast"...LOL! If you do get it make sure you get the handlebar risers and a mountain mod seat as the stock seat is a marshmellow and extremely heavy when wet. Good luck with your decision.