good luck on the new baja
i don't even have the real baja and i still love mine. You should also get an outerwears airfilter cover. it will offer a little more protection from dirt. it will also increase time between cleaning the filter.
those stock pin tires will not last you long, especially if you drive it on-road. Hostile tires are a great solution. if you run mainly off-road, get their MX tires and if you just run everywhere, get their AT tires. The Proline badlands are ok too but hostile is still better.