Get the logic 7. I think it adds great depth to the music.
You need the USB adapter to even add smartphone integration, which is a waste in my opinion. A $150 option allowing you another option to add a $150 phone adapter. It is stupid. Make the option $300 and select your phone adapter when you take delivery of the car!
'10 335i sedan/AW/Premium/M-Sport/Steptronic/Active Steering/6FL/Logic7/Sirius/heated seats/rear fold seat/alarm/Navi/Performance Power Kit