In reply to artif:
I just sold my steel framed Rohloff bike, as it was just a bit too heavy for my tastes and my current daily 4 km uphill commute. That was largely due to the frame, but the Rohloff hub is quite heavy, too, to the extent that you "feel" the inertia of the rear wheel, even if you do not care about the overall weight. The Rohloff hub also has some internal friction loss, so that it feels a bit more sluggish than a derailleur, but that difference disappears once you get enough dirt on your derailleur. I have ridden a Pinion bike only once, so cannot really compare these two.
That said, while commuting in the flat the Rohloff hub has been ideal, as it is virtually indestructible, especially with the "external" shifter (the "direct" version can be a bit fiddly to adjust especially in the field): Over the course of seven years I changed the hub oil twice, otherwise I had no repairs or maintenance at all, despite cycling through Euro winters with snow and salt on the roads and tons of grit in the cycle paths (cleaning of chain and cogs not included...)
Rohloff gear spacings are absolutely linear and it is easy to shift under load if you have to, but depending on the handlebar you want to use the standard Rohloff grip shift could be a pain.
CB
edit: Don't even think about the Shimano versions....
Post edited at 17:19