Only winding you guys up 
but saying that i still think the derailleur system is a far better job.
many a world tourer used the 9 speed mechs trouble free,and no need to change sprockets or chain and it doesn't need an oil change either,
I'm telling you boys are being conned into thinking the rohloff is the way to go.
jags.
I regularly ride four bikes, a bike with a:
- Rohloff,
- Derailleur eight speed cassette with road triple,
- Derailleur eight speed cassette and a Sram Dual Drive IGH.
- Derailleur seven speed cassette with mountain triple.
I can say with experience that each is different, but I think none is the best in all situations.
The Rohloff, I was looking for a heavy duty expedition bike with S&S couplers, decided to buy one with a Rohloff on a whim. I already owned a Sherpa so I was very familiar with Thorns, thus I bought the Nomad MkII. Have not used it yet the way the bike is intended, but regularly ride it anyway. Have put a bit under a thousand miles on it this year, some of that on 4X4 roads where it performed just fine.
The bike with the Dual Drive IGH, I really wanted a wider range of gearing than offered by the eight speed cassette, since I can't fit a triple or double crank to it the IGH was the only option. The bike is a foldup, thus the complicated drive train.
The other bikes are pretty mainstream so no need to describe.
