Most Durable Group?

[MattTuck]

What group would you all recommend to someone for durability and less required maintenance/wearing out of stuff?

I have an 8 sp. ultegra group that I've done virtually no maintenance on except for one new chain and cassette and ocassional tune ups. Nothing major has been replaced. Been pretty happy with that.

If you were looking at a current group, do any jump out as winning in the durability department? I'd still like shifting on par with my ultegra. (I'm agnostic with regard to campy/sram/shimano, just want something that will last and shifts decent)