IPads are great but iphones meh...
It sucks trying to keep your phone stuff in the same device as music collection, videos pictures etc.
I'd need a minimum 64gb iphone to pull that off with a lot of extensive music management.
I'll stick with a high end Android and ipod touch for music, games, occasional photos when I don't have my phone, and the occasional "not yet on Android" app
That way I get the best phone and the best media player
I see your point of having to separate devices - this is basically what im doing, just instead of high end Android im using my cheap Nokia in my daily life
and if i need camera, i'll grab my Canon...