I have to go with what Mark said. I like the 705 and ebay is running some good deals right now. There are some that are referbs but they still have a one year warranty. Most of them include the heart rate sensor and cadence sensor for 299 which is not a bad price.

I to have a 705 and really like it for all the above mentioned reasons. Downloading in the parking lot is one of the good options. If you buy one on ebay make sure that you get the maps chip with the 705.