The best noise-blocking Bluetooth headset just got better. The new Aliph Jawbone 2 ($130) is 50 percent smaller than the original, and steps up the noise elimination with DARPA-approved NoiseAssassin technology. The new headset also offers improved looks, thanks to its textured exterior and touch-sensitive buttons, and lasting battery life, with 4 hours of talk time and up to 8 days of standby service. Better looks, better tech, and a smaller size, at the same price. Sounds good to us.