right now I am using a garmin 305 but I would Like to start training with power.

My options are either get a power tap and have the 305 and the power-tap computer and have to download them separately OR buy a power-tap and a Garmin 500 and give the 305 to my girlfriend.

my question with the wireless/500 scenario is if I buy JUST the pro wheel and then buy a garmin 500 is that All I would need? would heart work through the 500 strap and would my 500 just add the power from the wheel data into my already GPS driven data?

is there a difference in the elite and pro wheel aside from the axle? or is it just the computers that differ?

what is considered the bomb proof power set up? I track my GPS training on Ascent right now so the power data would only be imported if it was inside a garmin file the ascent program says it wont read a power-tap computer