zx-5 sp VS zx-5 hooked up

[hummer11]

I was looking at getting a zx-5. i want to spend around $300 would it be better to get a normal kit + carbonchassi and upper deck and some alum parts or a sp with a carbon upper deck and everything stock?

on the sp front what size hexes does it have?

if i take the hexes off and put losi front can i run losi wheels?
on the back if i take the hexes off can i run pin wheels?