HTC's One X is hands-down the best smartphone released this year. While the version we're seeing here in the States (on AT&T, to be specific) isn't quite the beast the quad-core version found overseas is, the AT&T variant does pack LTE. Other specs:
1.5GHz Snapdragon S4 dual-core CPU (Krait architecture)
4.7" 720p display (1280x720)
8MP rear shooter, 1.3MP front
Full 1080p HD video recording at 60fps
Thankfully, those cutting-edge specs aren't going to break your budget, either: the phone is now available for pre-order on Amazon Wireless for $150 for both the gray and white models - that's $50 less than you'll pay to get it straight from AT&T.