okay so here is what i would recommend, the iPhone 5.
sure the S3 and the Note 2 are powerful devices as compared to the iPhone.. but after being a android user for about a year now and running it at stock, doing no modding and without running any special apps on it, lets just say i used it pretty much for calling and texting.. i have just grown out of it! the lag and the un-smoothiness whole android expreince is.. even on my friends S2! the phone lags like **** while doing simple tasks..
And i'm no apple fanboy.. or a person who just wants an iphone because everybody has one.
but iOS is way so much ****ing smooth in all aspects, it runs smoother, no lags, fast app execution/start up.. it makes it worth the price. i'm sure no one who has used iOS and Android both for a long long time will disaggree on that.
but if your someone who likes to play around with alot apps and a phone is a big part of your life and u can handle a little lag here and there, get the S3 and if you dont mind the huge size for the note 2? then note 2 it is.
but if you was me.. iPhone it would have been.