While I'm excited, I would really like to wait and see until the 64gb comes out in late August/early September.
A few weeks back, I had spoken to a Verizon rep manning a kiosk in a Target store, who infringed me of the impending 32gb release. I asked him about the 64gb and he said late August/September timeframe.
I would have posted it as an unsubstantiated rumor here, but didn't want to dance the scrutiny. :-)
So now I'm putting it out here since he was right about the 32gb s4, the 64gb version "should" stiff later this summer.
I am seriously biting on the 32, and buying into any service plan that Best Buy may have, which allows for an upgrade. ...I just wouldn't be able to root it until I settle on my final phone.