I know that you are moving from a 1.6 focus but the 1.6 engine in Audi feels more like a 1.4 in the focus. I was abit disapointed although I prefer comfort to speed. For some reason it feels abit constrainted. Having said that, you can keep up with the trafic in most situations and maintain 80 on the motorway with ease.
The parking sensors will be invaulable and will repay their cost for sure in no time at all. i've lost count of how many times I've almost bumped into some supermarket carpark stump that I couldn't see in my mirrors. good choice.
The Bose sound system sounds ok but but don't expect it to raise your pulse. it just sounds clear and rounded but is not fantastic. Infact I spent the first week of ownership thinking that for some reason It had not been installed probably by mistake as the speakers had the bose logo. I went back to the stealers and they told me it was. thats how disapointed I was. The reason I added it was becasue I didn't want to start ripping my car apart while it was new. My previous aftermarket sytem (no amp) that cost me half as much sounded much better and was louder.
One thing I miss though is the DIS. I'm sure you can still add it to your order. There is alot more information on it than it says in the Audi Literature. e.g. MPG, current Speed, Radio Station playing, Temperature, Driving instructions (if you have sat nav), Oil temp, current speed and a number of warining messages that you don't get on the non DIS display. Add it it is worth it.