My only concern with these boards is the support you get with them. Granted if something went wrong with a botbitz controller it would likely be chucked and a new one bought as they are cheap enough especially if you hacked it yourself. That was the other thing I like about the electronize controllers. I can easily fix them myself.

A $200 speedo is a bit different and how likely is that it would be fixable 4 or 5 years down the line?