If you've always had DCC, then you'll probably miss it; so the test drive is going to be absolutely key. Mine's (not TCR) in Comfort 80% of the time and I wouldn't be without it. I appreciate its very divisive though and plenty are perfectly happy to be without.
I think Nav Pro is a waste - the standard screen is nearly as big and OK, you can't have the map on both, but in day to day, it doesn't matter.
I think climate screen, grey and Dynaudio are good, solid choices -I wish mine had Dynaudio but I wouldn't wait.
Good luck with the test drive, you'll know by the end of it about the ride and then can have a think.