Best AC/DC album?

[Colonel Sanders]

After buying The Razors Edge and Back in Black, I think AC/DC could very well be my favorite band. Except, I haven't yet found an entire album that I like. I think I need to get a "greatest hits" collection, if they have one?

So any suggestions for the best AC/DC album?

Also, what genre should I label AC/DC? Should I label them "Classic Rock" or "Metal"?

L J