The note 3 is very near and specs look great, I'd consider that. I had the note 2 and loved it, but gave up Verizon and went to t mobile and got a nexus 4. I've got a friend that has the one and gs4, the one has a terrible camera for anything other than low light. The gs4 is an all around better pick, it has everything. The note 3 is suppose to take the gs4 design, be a lil lighter, have bigger screen (5.99") while keeping the same overall size of the note 2. Slimming the bezel making the screen bigger.
Imo I'd wait if you can, bc there are some interesting phone's coming like the note 3, moto x phone, and the one max (htc superphone) to compete with the Samsung note. Even a nexus 5 is very close to being announced. If you can't wait though I'd def go gs4.
Ill mention also that I had every iPhone up to 4 and once I went android, I never looked back. Ios is boring and multitasking is a joke, Apple is years behind on features compared to Samsung. Not Apple bashing, that's all my opinion of course, they do very few things right.
tappin from the Nexus 4