I'm shopping for a 2005 or newer 530/545. New 530 or used 545. I have always had manual trans. If I go for the new 530 the SMG is a $1500 option. Has anyone ever drove with one of these? Can you launch from high RPM? Is it smooth? I ask the dealer sales guys and they just scratch, go all slack jawed and say "SMG,...Huh?...we never see any 'O them 'round here". It looks like a cool option but I just get no info from the dealer. Help!