I think the auto is a really wonderful experience in the M135i...and I am (or was) a devout manual driver. But it is a matter of personal taste. Cruising, the tachometer shows just over 2,000 rpm at an indicated 120kph in 8th. That is just one aspect. I like rapping it through the gears in Sports mode....lovely!
As for iPhone 5, b/t etc...I recommend the extended B/t, mainly because that seems to be the minimum configuration to get album art display and the steering wheel controls to work. I think the second hand market will become quite discerning about this, too.