I'm thinking about getting the Ergomo Pro too. But can it display your HR as a % of maximum? Can it also have multiple exercise files like the Polar HRM? I don't like how the Powertap has one big file because when I workout sometimes I take a lap break and I want to stop a file. Then start a new file when I resume.
How happy are you with the ergomo?
Maybe you need to run a second bike computer for distance. My workout bikes have either an Astrale 8 or Flightdeck and a Polar Power Kit.
The Ergomo can't display HR as a percentage of max HR - but moving to power based training this is no longer an issue.
the Ergomo has an interval function, similar to the PowerTap, but you can't start a whole new file manually. Youuucan set a duration the computer must wait before starting a new file though.
Not too ken to have multiple bike computers on the bike. The Ergomo display is already quite large.