Currently speccing up an A3 S-Line to order and can't decide on which audio option to go for. I had an A3 Sport on test from the dealer which apparently had the standard system. It was a little disappointing compared with the sound system in my A4. The demo A3 had a sub in the spare wheel but it wasn't branded B&O. I questioned the salesman but he was adamant that it wasn't upgraded. Can anyone confirm if their standard system has the sub in the wheel well? Also interested to know if anyone went for the audi sound system for £255 and how it compares? The B&O in the showroom sounded great but £750 is a big hit.