They still make the nano. They are like 8 and 16gb now. You can't get AC/DC from any online MP3 provider last I checked. At least not single tracks.
The classic is good, how many GB are you needing? I think you can get a 64gb touch now?
iPod nano - Buy now and get free shipping and free engraving - Apple Store (U.S.)
I'm about to pull the trigger on a product(Red) nano to go in my LunaTik red backer edition watch band I picked up earlier this year.