For people finding that Goldener Hirsch is to much kitsch and US guest centric, try the next door Art Hotel Blaue Gans. Also in a historic building this is the place for real insiders to Salzburg. The whole experience is crisp and breakfast as well as their restaurant (weather permitting on a large terrace facing the fountain and the large festival theater) are excellent.
Sorry this is neither a Virtuoso nor a Starwood "luxury" collection property
. Book well in advance! You won't get any perks or freebies in all cases, but the sense of exclusivity.
Staying Salzburg countryside and wanting to escape large brands, may I strongly recommend Weisses Rössl am Wolfgangsee. Best are the "Kaiserzimmer" and for sure you will enjoy the floating pool in the pristine lake.