Looking between the Stealth 50 and Garmin. I want to spend the least amount to accomplish what I want.

Ability to track the following: gps points, average speed, max speed, altitude, distance, cadence, heart rate, time riding, start time, and end time.

I'd like the ability to log each trip in a CSV file so I can import it into my database and trend my stats. I'd like to also import it into one of many online sites for cyclists as well.

Finally, I don't need to view maps on the device. My iPhone will navigate me while riding, however, I want this device to log GPS points so I can load it into a map to see my ride history.