Don't worry so much about parts. Seats and pedals in particular are generally provided (if they're provided at all) as placeholders, as it's assumed the rider has his or her own preference. And other parts, even ones as major as the wheelset, aren't necessarily meant to be ridden forever. So don't ignore the component package completely. As the frameset is the biggest building block of your bike, make sure that's exactly right—the rest can always be changed.