I have a dilema. I'm thinking about selling my Aeris 300G and comp software, so I can get the Suunto wrist mounted Vyper. Can anyone compare the 2? Is the Sunnto a much more superior computer to the Aeris? Does it pay to keep the Aeris/SPG and use it as a back up? Help I'm confused and not sure which route to take. Help me...... PLEASE......