Which is better: HTC Sensation or LG G2x?

If I were you, I would go for the Sensation. Obviously, it has more pros in your list than the G2x. In addition, the G2x's interface is pretty dull and boring. You should definitely check out both devices. But the G2x right now is temporarily out of stock and T-mobile bumped the price up. You could also just wait for other phones to come out, but if you're gonna buy it now, you should go for the Sensation.