FWIW: Keep the "cofounders" to a minimum, my choice is ONE. This is not for greed but for focus and unity in vision. Feel free to offer people all the perks you want, but try to keep the steering-wheel in as few hands as possible.

[Edit: I can understand why a VC might be interested in having multiple cofounders, and aside from the obvious diversity in opinion, VCs might also be interested in having a team that might be easier to break up at the right point; paying out the least interested cofounder early leaves more for them. If you're self-funded hire others.]