I got a Slayer Pro 4x4 and broke in, tuned, and running great. I was wanting to start upgrading some stuff. I will mostly be running it on pavement and hard pack dirt. I know the sway bars are a must from what I have read, what else would you recommend?

Also what bodies will fit the Pro? I know it is bigger and I haven't ran across any that say they fit. Also what tires would you recommend for a good pavement/hard pack dirt? Any upgrades on the bumpers also?