4 vs 6 wheels (what to choose)

[HarveyAce]

We in team 3329 are apparently still in the process of choosing our drive system. We are debating 4 or six wheel drive, and I am leaning toward the 6 wheel because of the balance and weight distribution of our robot, especially if we are planning on making something to reach up to the top pegs. are those factors to take in with the selection of the number of wheels? It also may help to let everyone know that we are using almost the same design layout for the chassis as the kop, but we are re fabricating it in 1/8 in aluminum box tubing, because we had issues last year with the c-frame warping, and our robot was EXTREMELY light last year. So 4 or six?