I've got the 2012 Sputnik and pretty much upgraded everything out of it. Having done that, the only upgrades that really mattered for a street rider like myself were the pedals, clips, straps (which you've done already), saddle and bars. Everything else is adequate. Saddles are very personal, so you'll have to try whatever works for you. Most popular choices round here are Brooks B17, Brooks Swift, Fizik Arione and Selle San Marco Supercorsa. Personally, I'd just leave it as it is for now. As for your neck hurting, your stem may either be too low or too long. Do you feel like you're reaching out too much or bent over and looking up too much? It's ok to have a ton of spacers if that's what it takes for you to stay comfortable. Of course, it means you may have benefited from a larger sized bike, but that's a different issue in itself. As for bars, I'd go with either some risers or bullhorns if I was going to go brakeless; there's not much control in those track drops.
Last edited by Training.Wheels; 07-15-13 at 11:58 AM.