Andi, Great report, thanks! Budapest is also one of my favorite cities, and I'll add an endorsement for the Budapest Hilton. Unlike most of the "downtown" (Pest) hotels, it is up on the cliffs in the castle district (think old, cobblestone streets, street cafes & bistros, candle light, and horse-drawn carriages) with fantastic views of the Danube over the fisherman's bastion of Parliament, Margit Szeged (a fabulous island in the middle of the Danube for a day visit), and all of the bridges. Rooms, service, food, and location were excellent.

Cheers,
Ken