Comment These Three Things (Score 0) 169
The GPS Watch: The Garmin Forerunner 10. It's waterproof and fairly minimal in terms of features. It does exactly what a runner's GPS watch should do and nothing more. https://buy.garmin.com/en-US/U...
The iPod: The current generation of iPod Nano has built in Bluetooth. Sweat being a problem - don't wear it on the arm. Get a clip to stick it on the waistband. The HHiCase (or roocase) works pretty well. http://www.apple.com/ipod-nano... http://www.amazon.com/iPod-Nan...
The Headphones: YurBuds makes an excellent product (Liberty Wireless) that wraps over the ear, resists sweat and water, and allows ambient noise to reach the wearer for safety. http://www.yurbuds.com/en/wire...
I used all three of these in my first Marathon last year. Nothing failed.