what upgrades?

okay so first I would get a barrel probaly about 12in to 14in. Some barrels i would reccomend would be a custom products 2-piece barrel, flatline, or any dye barrels. You can get a custom products barrel for around $60 the flatline will cost you 100-140 dollars. The dye barrels will be pretty expensive. The good barrels will be around 100-160 dollars. 

flatline system:http://http://www.firstcallpaintball.com/detail.aspx?ID=297

infinity barrel:http://http://www.firstcallpaintball.com/detail.aspx?ID=919

Then I would get a stock for your gun. I tend to prefer collapsebile stocks so if you want you can move it out of your way. 

stocks: http://http://www.firstcallpaintball.com/SearchResult.aspx?K eyWords=stocks

Then if you shoot fast I would get an electric loader. Try to stay away from richochet rhino loaders and vl quantums. A vl revvy should do the trick, or an empire reloader is also very good.

Empire reloader:http://http://www.firstcallpaintball.com/detail.aspx?ID=86

vl revvy:http://http://www.firstcallpaintball.com/detail.aspx?ID=322

I would recommend getting a drop foward. It all depends on you though whether you like to use the tank to stablize your gun, or whether you want it out of the way will determine what kind of drop you want.

Another great upgrade is the comp-air low pressure. There Isn't really anyhting to say but that it converts yout tippy to low-pressure. 

If you really want to you can also get a new bolt for your tippy. It doesn't really do much though.

get a double trigger as well it will help you shoot faster

http://http://www.firstcallpaintball.com/detail.aspx?ID=724

That about wraps it up. All of the link are from either firstcallpaintball.com or actionvillage.com because they are the lowest priced online sites that I have found