Well I've finished the Level Upper Arc for the manga and I'm now starting the Sisters Arc, honestly cant wait, even though its the most depressing arc I've seen so far its also one of my favourites as the main event for Mikoto, another hero move for Touma and the Introduction of Accelerator (most badass esper out there)=D
So I guess after the Sisters Arc I better read the Liberal Arts City stuff, or I might just wait and see if they release it in English first, hmmmmmmmmmmmmm!