If an expert skiier likes Whistler...what would he like in Austria?

Definately St Anton. I lived there for a season, you'll never be bored for a challenge and you can ski off piste.

Solea, if you do head to StA, and want to head off-piste, do have a read up on the different terminology for insurance cover in Europe. As a huge generalisation, European off-piste is the skiing done away from marked and patrolled slopes, which may be inside the resort's boundary, ie: between pistes is considered off-piste, and insurance cover needs to reflect this.