since you are a loose knitter, i'd get as many of the smaller needles as you can. i think it is reasonable for YOU, as a loose knitter, to use 0 for socks.
i would get all 6 in the 32" lengths. i loves me some magic loop!
so my final answer would be to get 0, 1, 2, 5, 6, 7 for your needle sizes. do let us know what you decide. this is exciting!