By now you've likely seen or heard of ONEPLUS, and their "flagship killer" the ONE. If specs were the only thing that mattered, there would be no good argument not to get this phone. The larger capacity ONE brandishes:
5.5inch 1080p 401ppi display, 2.5Ghz quad-core Snapdragon 801 processor, 3Gb of LP-DDR3 RAM, 64Gb of storage, and CyanogenMod 11S OS over Android 4.4.
The best spec of all is the price: $350 USD. Those are incredible specs for a phone twice that much (maybe even when subsidized by a carrier). Needless to say, I would love to get my hands on the One.
Currently, phones are only going to folks with invites.