I'm looking for something to integrate my iPhone into my new Mini. I have factory Sirius, and I'm considering the Mediabridge 1500 w/ Bluetooth and the Silverline Duo. I know I'll have to buy a special $30 cable for the Sirius to continue operating, but is it really worth the extra $100 plus to go with the Duo just for the Bluetooth? It seems that both will work with the MFSW and both have to be mounted in the trunk since I have Sirius. Thoughts?