I'm a little confused. I guess by "bipeds" you mean four limbs total, and by "quadripeds" you mean six limbs total, but I don't really get if you consider animals like cats or dogs "bipeds" or "quadripeds" then, since in anthro form they may stand on two feet, but in animal form, they stand on four, making them quadripeds. Taurs, meanwhile, always stand on four feet.
Anyway, I can't really pick between any of them, however you mean it. They're both great in their own ways.