The tram, from what I can tell, is worth it at least once just for the experience. I've watched a hundred videos on the cirque and really want to drop it but man it looks beyond steep. If anything though, you can traverse over and drop the mini cirque which looks a bit too mellow.
Or I think you can work over to Barry Barry steep from the tram also.
Definitely I'd take a tram ride if for nothing else the beauty at top.