Another spare tire thread

So I have finally given up and want to put a spare tire in the trunk whether it be a full size aftermarket or a space saver. So I called up Bavauto to buy a space saver spare only he told me he did'nt want to sell me theirs because the wheel would be too close to the stock front caliper. Although now I have found this one which claims it's fine and shows a video of it being used with no problem. So my question is what should I do go with the full size or trust these guys.
http://www.bimmerzone.com/BMW_Perfor...T-F10-KIT.html

We tested this and it does clear the calipers

I bought one from Bimmerzone along with their tote bag. IMHO, it is the way to go.