I see lots of people modding/upgrading their Bromptons. Ranging from $50 Ergon grips to a $1500+ Rohloff hub. If you could build your Brompton again, what would you choose to do right way, and what upgrades would you put on the back burner?

One of the things on my mind is: is $800 in Titanium for the superlight better money spent that $800 on other parts (Ti seatpost, Ti hinge clamps, SON hub, etc).