I've got pretty much every option you have listed as standard on my Titanium X, apart from the Sat Nav system, ACS and the dress up kit. I have got the sat nav and love the fact you don't have to do anything to it when you get somewhere. No taking it off the windscreen and putting it in the glovebox and all that fad. Also all the cables running around with my old Navman was an annoyance! ACS works well (tried it with a willing friend ) and it stopped the car about a foot off his big rubber bouncy castle! Love using the DAB and the Keyless entry is nice to have as standard but if I'd gone for the Titanium I wouldn't have coughed up for it. The EATC I leave in the Auto mode at 22c all the time just without the AC on, so its just running as a climate control system without AC. Pretty good however had to resort to turning the AC on today on my commute home in the traffic!
Interesting to hear about MPG and cruise control. I use my cruise control all the time on the motorway and I get better MPG than using the old right foot. Averages on my daily commute about 78.8 over 80 miles on the cruise control and only 72.4 without cruise on. I also use V Power Diesel which has greatly improved fuel consumption so will put that in as a recommendation!
Cruise control doesn't work on efficiency, it works just to keep to a speed, so where you might slow to 60 from 65 going up an incline to keep it at a constant % of power, the cruise will increase power and therefore fuel to keep it at 65. Once you get the right foot carefully able to keep within a mm of a position, the high mpg's come on by