P3 all the way mate! they are great! The build on the P3 seems a lot better than the otheres even though the brakes are cable if you are jumping a cable will be fine, hydro discs when you jump are poo ive always run cable discs on my jump bikes, its a lot easier to adjust them withought havong to bleed the whole brake. Tyres arent to much now, dont let that put you off of a amazing bike! If i rember correctly the P3 only had one ring and a set of rollers so there will be no worries of snagging trouseres here and the roolers will be a good part to have, and DJ3's rock. hope ive been of some help