I voted for the debut. Great album. Although, it is the only Clash album I own, so I am a little biased. I saw Give 'Em Enough Rope on vinyl secondhand this year sometime, went back to buy it another day and it was gone
I Fought the Law is a classic. One of the best songs ever Written. It's one of them songs that I loved when I was a little kid, but didn't know who it was or even cared who it was, until I was older and then went "Ahh, so that's the Clash".