Are there other devices other than Edge Insight to monitor engine functions? What is the best?

Edge Insight CTS is the best option available.

:)I have the Insight and the Dashhawk both made by Edge, About $300.00. I would not turn around for the difference. Good luck.:)

I use a dashdaq, and have been very happy with it's versatility, and custom screens etc...., and it also doubles as a GPS.

http://www.dashdaq.com/