I'm not too wrapped up in the CPU specs, but the screen res is a sore point. The competition has much higher resolution screens.

As for single NA model with all the LTE and HSPA+ you could want, I already have that with my Sony Xperia ZL C6506. The ZL has a 1080p 5" screen that looks great. The bezel is incredibly thin, it has expandable storage, the camera is fantastic, dedicated 2-stage shutter button, NFC, BT 4.0, JB 4.2.2, and it's "only" $500 unlocked from Newegg.

I think it's one of the best phones out there now for the build quality, style, radio bands, and price. Unfortunately, it's not running stock Android. But, the Sony skin is so unobtrusive that I haven't bothered to replace the launcher, let alone flash a third-party ROM.