EasyCure, you should check out Broken Social Scene and Arcade Fire if you haven't already. Good Canadian bands.
I listen to a lot of British bands too - I'd recommend Arctic Monkeys, Blur, The Libertines, Franz Ferdinand, Muse, Bloc Party (you mentioned these two), and The Smiths. The Verve has some good songs too. I still haven't completely decided on Joy Division yet. And of course the obvious in Radiohead and Oasis.