The Spark scooter is an AW deck. And AW's are junk for the kind of riding we do here.
I'd suggest a Pro Model or an Ultra Pro.
Check out the Scooters section of the forum, there is a stickied thread at the top called the "Scooter Mod Bible." I'd suggest bolting if you get a Pro Model, Ultra Pro is a one piece deck so no folding system. Aside from that the rest of the mods are up to you. Headsets, Eagle Wheels and bearings are a good thing to have too. Makes the scooter perform a lot better than stock.
EDIT: Just remembered we are in the Scooters section, haha.