Trying to decide on which 1000 to buy!!

Im looking to buy an 18 model turbo xp 1000 just not sure which model I should get as far as the S, ride command, dynamix. I was mainly wanting to know the difference in just a regular xp 1000 turbo and the 1000 xp turbo S, also if the ride command and dynamix is worth the extra money. just looking for whatever input I can get before I buy one, and what would be a good deal on one! im located in southern TN