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I've never heard that you have to order the idrive in order to get surround sound functions + graphic equaliser and preset equalisers (e.g. concert hall etc) for the Professional Hifi. I think the dealer is screwing you around here... as far as i know, the idrive makes just ipod navigation easier as the interface is better, plus it's more true to the actual ipod's navigation via the idrive knob.
Regarding "Logic 7" in the 1er -- there is Logic 7 processing from the amplifier but, it's not real Logic 7 that comes in the 3 series and above models. The 1er has no centre speaker, so it's actually a simulated logic 7 effect.
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