[Lawpass]

Welcome to the paintball the addiction!
I'd suggest going out an playing with it a few times to see what you like and don't like before putting any money into it.

The only two things that might be worth looking into before would be:
1. A new loader, either anything electric or the Proto Primo. This will prevent chopping problems.
2. If you get a new loader, a replacement feedneck. Those plastic adapters drive me crazy but the length helps with gravity loaders.

After you've played a bit and know if you like the sport, you might look at an HPA Tank to replace the CO2, and maybe a new barrel. I'd hold off on bolts and electric triggers until later too as they aren't always a good idea.