Originally Posted by
BearSquirrel
The Sigma 8 is a high quality unit with a large display. One feature you did not mention is altimeter. athe ROX 8 does that as well. As a bonus it is PC sync capable. Though you need to buy the software and sync harness separately. Besides having a large display I think there is little difference between the ROX 8 and the Topline computers.
By contrast if you get the ROX 9, you get the software and sync harness with the unit. Aditionally, the ROX 9 also keeps detailed logs of your ride that you can analyze with the PC software.
actually i did mention gradient functions, which seem to come part and parcel with any altimeter functions. but thanks for taking the time to respond =)