I'm currently using the Otterbox Commuter case for my iPhone 4 and have to say that it is one of the best cases I've used in a which (only con I have is that the silicone parts seem to attract loads of lint). I want to now get a Speck Candyshell but I'm unsure whether to get a black or the white version? Can anyone offer any advice?! Is the Speck larger or smaller that the Commuter?!