I have a couple of enterpreneur friends that say that you should always aim for an even number of founders (3 in the best scenario, never 1, hardly ever 5). Having an even number helps when 'voting' things, so the tendency is to keep things moving... having been an enterpreneur myself (with 3 other people), I must agree with them

Even further dilution. How important is a 5 million cashout when you only have 7% left of the company you slaved on for three years? I never plan on taking VC money if it is at all possible to avoid.