Simple. If youre going for the aggressive sporty look. You cant possibly achieve that without a staggered setup. If you dont care about that kind of stuff and you tend to order your BMW's without sport pkg, then dont go staggered and give yourself the ability to rotate the tires like zoich said. Its mostly personal preference. And your wheel dealers are idiots. BMW, Porsche, Audi, Lamborghini ALL offer staggerred setups from the factory on ALL of their offerings with AWD. Dont go back to those retailers as they're obviously ignorant

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2013 F10 ///M5 (ED 11/2)
2013 X6 50i Msport
2008 Smart
2012 Jeep Wrangler Unlimited