DrWJOD,
Your insight is valuable. I have a Cycleops Powertap. It sounds like I'd have no issue with the virtual down hill. A speed cap as a safety feature sounds odd.

Can you rate your (or my view) of the Fortius features not offered from standard resistor trainers (I have a Cycleops now)
Motorized adjustment to a course (compared to linear speed related fluid or mag resistor),
computer capture of complex work outs,
ability to add/create workouts is GPS (I have an Etrex HCx)
cool virtual DVD workouts and graphics,
ability to race others via net
headset steering
Thanks