The spec series are really nice, however the N400 can hold larger air coolers and has a nice metal construction if you don't want a lot of bling (correct me if i'm wrong).
I really like the Corsair Spec series. Spec02 or 03 might be better. Spec-01 won't take a hyper 212 EVO cooler and no drive bays for SSD.
I will go with 100R because the SPEC-02 is now more expensive and the N400 it looks cool too but i am installing a dvd drie to it so the plastics things and covers make it look ugly