As the latest wireless headphone design from JayBird Gear, which has been churning out impressively small Bluetooth earphones for years now, BlueBuds X ($170) is pitched as a deluxe model with the company's "best ever" earphones: eight hours of battery life per charge, over- and under-ear wearing options, white noise reduction, voice prompting, and improved wireless audio quality. BlueBuds X comes bundled with multiple sizes of ear tips and cushions…