Hyper 7 PBS is by far the biggest bang for your buck and by the time you've bought a high torque servo (which you would have to for any other 1/8th kit), various springs and oils then it is a bargain. I have been racing Hypers for some years now and hae sen mine drie away from things that have crippled other buggies (incl. kanai 2, 3s, MBX 5's and storms).