You might also look at Nuvinci which seems to have a growing following, with some reports that they have excellent strength and durability.

I thought I read earlier that SRAM was discontinuing at least some of their IGH offerings. Their future in the market might have me scared of taking the plunge with them if I felt there were other alternatives.

Overall, I'd encourage you to choose a hub based on the features you want.

• Nuvinci: Continuously variable transmission.
• Rholoff: 14 speed
• Alfine: 7, 8, or 11 speed, good price points
  Shimano also has a Di2 option with some of their hubs, allowing adaptability to road bikes and other platforms.
• SRAM: Dual Drive. I think Sturmey Archer also has a Dual Drive verison available today.
• Sturmey Archer: 3 speed fixed, also some good 3 to 8 speed hubs. Also the Dual Drive option.
  I think Sturmey Archer also may have the best support for bar end shifters.