Came close to getting a GS4 today at my local ATT dealer, but backed out at the last minute because AT&T was out of white at all the shops in the area.
I'll hold off now until after WWDC and see what iOS7 has to offer, and scour for a used GS4 instead.
Despite what many say about the plastics, I think the GS4 actually feels pretty good in the hand and doesn't feel as large as it actually is.
There is some UI lag though, which I absolutely hate, and is a big reason why I dumped android to begin with.
If I do get a GS4 I'll still be using my iPhone5 as a mega iPod Touch.