Campy 10sp or 11sp?

[Thorn]

If I were to build right now, I'd be looking at Campy Athena for a go-fast bike (if my 14-17 qualifies as "go-fast")

My nice bikes are Campy 10-speed, but RideBikeMe has a point. If you keep your bike a long time, then you want to be able to repair and keep it running. If you buy 10-speed, you're already buying a couple years less of maintainability.

Sure, the lower end is still 10-speed, but when you do maintenance, do you want to be looking and downgrading your component because that's all you can get?

As for 11-speed reliability (my fear with the narrow chain), my LBS guy has run Athena without issue and I'd say he can put more power into his pedalling than I ever would.

Edit: Oh yeah, and as for the extra gears....it is the in-between gears that you're getting. Going to 10-speed from 9-speed meant adding an 18(?)--a gear in my normal spin range meaning I can find a nice spinning happy gear for long rides.