I just moved back to the States and was curious... should I get the Phaeton with the V8 or the W12? I mean, 335HP is probably good enough, but the 420 really sounds like it could make me hard everytime I drive it. The base price difference is a mere $15,000. Hmmm, this is such a dilemna, should I get the W12 of be very humane and charitable?