Math, computers, and recommendations, please!

[OakLeaf]

Properly installed sensor wires aren't "in the way" of anything. They can be prone to breakage if they're installed loosely.

What features are you looking for? What parameters do you want to be able to track? Do you want to be able to download your workouts onto your "regular" computer? There are all kinds...

The computer isn't "recording zeroes," it's dividing distance by time (which includes stopped time). It actually takes quite a bit of sophistication to be able to exclude stopped time from your average. Then there's the question of whether you want tweak your data before you download it, or whether you want to download it all and use other software (like SportTracks) to tease out particular bits of data.