if its your first ss/fg then I am not sure what needs to be upgraded from the get go. pretty much all the stuff you mentioned is based off of your own personal tastes and feels in regards to comfort. Inspect it once you get it out of the box, make sure the lockring is tight if you plan on riding fixed and the wheels are true, and most importantly spend some time on it and put some miles on it. Then you'll begin to find out what YOU want on YOUR bike. have fun you rascal