Advice needed

Hi First post . I hope I can keep it short .Doubt it though .
Anyway . I just got a 2010 Ford Transit Connect XLT Wagon .I was going to go with the built in Nav etc. but it was burdened down with stuff I would not need or ever use . So I ended up with just the Nokia bluetooth system for hands free phone . I was previously spoiled by my other vehicle a 04 Mini Cooper S type with built in NAV and hands free phone ,where you just turned the ignition on and the phone would pair/connect? without turning the radio head unit on . This set up I have now you have to turn the radio on to make the phone Pair/Connect,which is not what I really want .The Mini had a Harmon Kardon upgraded sound system this one to put it mildly is not so good ,just 2 small door speakers.So I was hoping for some suggestions in what I could do to to try to make my wagon more to my liking .

First off I would like a NAV ,there is room for a double din unit (well I think thats what you call it ,like a large square opening ) .I have been pointed towards a Kenwood DNX5160 but have no clue if that would be ok for the basis of my upgrade. but I do like the Garmin NAV set up on this unit .
Next would have to be Hands Free phone set up (Bluetooth ???) Preferably where you just switch on the ignition for it to pair / connect .
Next Audio Maybe just a speaker upgrade ,nothing BOOMing but a little more crisp than what I have now .

Also maybe ,if I am not pushing my luck Recomendations for Alarm (have passive on the vehicle ) and Auto start.

Long post me thinks . I hope it all makes sence ,and thank you in anticipation for your time and trouble helping me out .