What upgrades are reccomended for my spyder rodeo paintball marker?

okay so im a complete noob to paintball and i recently acquired a spyder rodeo. i took it to a paintball field the other day and sat through their saftey seminar and everything. afterwards i sat and watched two teams duke it out... i noticed that the guns that the players were using had modified barrels, stocks, grips, and the like. the course doesnt allow for modified triggers so i know that there are rocker triggers available but i dont realy need a trigger upgrade. im more interested in getting my gun to shoot more accurately...im uming this is accomplished with the barrel. if anyone has any suggestions for upgrades for a spyder rodeo... id greatly appreciate the input.