I would choose (and am in) Nuvos although that's got a certain amount to do with laziness, Partnership didn't seem worth the effort to go for.
Out of interest if you don't mind what graduate scheme and what department?
you'll probably want nuvos if you're going to be there for a while. It's not going to be as good as a lot of people who've been there longers pensions but it's still going to be better than the majority of equivalently paid private sector jobs.
Cheers, not one I know anything much about but good luck for starting and I hope you enjoy it.