Freedom????
I'll give you my technical analysis on ownership of the NAV VI: You know when you are a feeling a bit backed up and you haven't had a proper dump in ages, then one day, you go and it all just comes out and you feel lighter, healthier, with renewed energy, no more gut pain, no more indigenstio? You need to moan audibly as it all passes out of your body, even the stink of it is glorious because you know it's all going out.
That's how I felt when I sold my three week old NAV VI for the same money I paid for it (20% discounted price from the dealer).
With a bit of fettling the TT was an easy fit. Having a TFT, the interaction with the whizzy wheel is largely redundant on a nav device anyway as I NEVER play with screens whilst I'm riding; my eyes are firmly on the road 98% of the time.