Strange there has been no mention of rear side air bags - the most obvious "safety option". Anyone ordered them?
In terms of safety/assistance systems I went for Lane assist, ACC with pre-sense front, auto wipers and lights, High Beam Assist, front and rear parking sensors, both the dimming mirrors, HHA and the speed limit display. I also got many as standard, such as ABS, ESP, various air bags, active bonnet, seat belts, power steering and an automatic choke. Every one of those systems has limitations and must not be relied on absolutely. I know that and the manual makes it very clear as well. Generally the systems are well designed so that you can't become reliant on them. For example - side assist puts the warning light on the relevant wing mirror, so you still need to be looking at your mirrors. Lane assist will switch itself off if you let go of the steering wheel (apparently - I've not tried).
My commute (which is the majority of my millage), is a fair mixture of roads. The stretch on the motorway in moderate traffic is dull - ACC in particular makes it far more pleasant. ACC has really impressed me, but it doesn't see a cascade of brake lights half a mile ahead. In that situation I take over and increase my following distance in anticipation. My commute also take me along a country road. If it's clear I might have a few minutes of spirited driving, but today I was behind a van doing 40-50 mph the whole way so again I used ACC. Another part of my journey is through a town, with many hazards such as bin lorries and school kids, so full manual mode engaged.
I'd definitely spec ACC again, but maybe not lane assist. I'd be really tempted to go for an S tronic with ACC - in a traffic jam that must be wonderful.