Congratulations! Now you can start buying all the fun stuff that goes so well with the sled.
I have the same sled (blue) in an 03. Go to a Arctic Cat dealer and order the aluminum rear rack for a 1M cat. It fits perfectly on the tunnel extension and looks like it belongs there. The reason you'll need it is, storage is at a premium on this sled.
The measure the inside of the rack and order a bag of your liking that fits in it and you're set.
I am curiuos on how they changed the clutching on the 04 RX-1M? I have Heavy Hitters, Dalton, Yamaha 8DF, 8DN and 89A weights (so far).
Then there are lightweight batteries, hiperfax, Simmon's skis, belly pan protectors (I'd prioritize that one), left handed throttles, ect.
You'll also need a oil filter and some oil on hand so you won't have to hunt for them when you need to perform your first oil change.
Good luck! If you need advice on anything for RX-1 mountain sleds just ask me or Spray. We both have BLUE RX-1 mountains too.
There are a few others with downstream colors that may be of some assistance as well; namely Silver streak, treewhacker and Blacksabbath.
Again, congratualtions on buying what is probably the funnest new sled most of us have ever had (to date). Powder Blue