In reply to RX-78:
Both Stubai Alps and Zillertal Alps excellent. We did the AV2 a few years ago and parts of it weren't nice - long scree slogs, although other parts were good with great scenery.
Also done Haute Route, Tour of Vanoise and GR20. Did part of the Pyrenees Haute Route but were unlucky with the weather.
All good but depends what you want. Unlike old jaunts in France with just cans of kronenbourg in the huts, we liked the Tour of Vanoise. A bit easier than the others, animal life good, the huts were great and beer from local microbreweries in the huts.