I know it's 'recognised' that in the US everything is 'bigger, better and other-worldly'. However, your Buffalo's have wings?!!!
As an aside, aside from the HRC, I can't suggest anywhere else in Amsterdam anyway, where you'd find buffalo wings.
As a recommendation for really GREAT burgers however, I'd suggest Burger Bar at Kolksteeg 2 (between the Damrak and the NZ Voorburgwal, just off the Nieuwendijk), SERIOUSLY good, cooked to order REAL beef burgers.
Whilst a lot of Dutch people are fascinated by Americana, they seldom replicate it too well. There's a 'traditional' diner in Purmerend called "Caddy's Diner". All the twee off-the-shelf slants on Americana that you'd expect; enamelled Coke advertising signs, non-operative booth-by-booth juke boxes, etc., but the food ... atrocious. I met the owner once and enquired why the food didn't taste that good. She explained that when they opened, they employed a US chef but the Dutch clients didn't like the food, so it's now been adopted to the Dutch pallete with Dutch kitchen staff!
I was a wee bit spoilt in my upbringing. I lived near Aberdeen, the oil-drilling capital of Europe, so, with the ingress of US Oil personnel and executives a few "American Diners" sprung up. The food (and portions) was truly American, and truly wonderful. What price a HUGE bowl of steaming Radar's Chilli Con Carne now?