NYC chain or 2 mini krypto evos. Or one evo if you're feeling lucky, i.e. not in manhattan.
your bike is still not safe. if you can see it, watch it. never leave it outside at night, ever.
when I lock up at school I use the nyc chain and a mini for good measure, cause it's an hour and a half class.
no matter what you are using, a thief can get through it with a 50$ battery powered hand tool.
you'll get used to the chain.