I'd recommend watching both just so you can see the entire trilogy.
Ideally speaking, everybody gets to see every single film in the world. At one point in my youth I was determined to see at least most, but then reality got the better of me. I see a lot of box-ticking in this thread, a lot of testing one's self-endurance against really, really rubbish films, just for the sake of having seen them.
I think a lot of people would benefit by making a conscious effort to watch more fantastic films, instead of the shitpiles of garbage they already are. Otherwise, it's a waste of energy.
...dot com bold typeface rhetoric. You go clickety click and get your head split. 'The hell you look like on a message board Discussing whether or not the Brother is hardcore?