Cateye Stealth 50 with GPS & ANT+ for $150 @CatEyeBicycle
The Stealth 50 is a simple power meter that is ANT+™ compatible, so it works with CatEye or third party ANT+™ power, heart rate, cadence and speed sensors. Track basic cycling data and combine with power, heart rate and cadence data to target and reach training goals. Upload ride data to web-based training sites, such as CatEyeAtlas.com and TrainingPeaks™, where you can visualize your activity, analyze performance and share your ride.
Other features include a full-time backlight, auto-stop/start and programmable odometer. The Stealth 50 is waterproof, USB rechargeable and can be used on multiple bikes, so you’ll always be ready to ride.