'Audio' CD-Rs are no better for recording on, but are worse on your wallet. They are required if you use a standalone 'Hi-fi' CD recorder, but not if you use a computer based recorder.
The vast majority of audio players will play CD-Rs, and of them most will play 80 minute discs.
I've not yet found a CD player that can't play CD-Rs, but I have found a couple that can't play to the end of 80 minute discs (they stop at about 74:30).