Originally Posted by
MileHighMark
I'd like to hear more about the Supernova front light. I'm currently running a B&M Lumotec IQ Cyo R, and it's a pretty decent light. I tried the IQ Cyo N, and although it's supposed to be brighter (or at least, more concentrated), I didn't like it. The Supernova looks really nice, and I've considered getting one (or a Schmidt Edelux), but I'm not sure if it'd be compatible with my Shimano DH-3N80 hub. I'd also need a mount that's compatible with low-profile canti's (see below).

The Supernova lights are of nicer construction - not that the Lumotec lights aren't nice, but the Supernova lights are luxury. They're a little brighter, but the Iq Cyo offers a very competitive brightness considering the lower price as well. Supernovas are more of an investment light. They're designed to be upgradeable, and Supernova offers a service to bring them up to date as lighting tech improves.
They will work with a Shimano dynamo. I'm using mine with a Shimano DH-3Dsomething or other. (Edit: DH-3D72 apparently.)
Unfortunately, none of their mounts that I am aware of will play very nicely with that cantilever set up you have. It isn't recommended to use them on mounts not intended for Supernova, as they are heavier light units and may fatigue / break the light mount! The multimount from Supernova is skeletal and a cantilever wire can go through it if the harness is below the mount, but your cantilever's cable harness is practically right at the bolt head, making it tricky. A handlebar mount is also available if needed, but i'd prefer fork crown mounting.
Personally, I wouldn't much worry about it for now. The Iq Cyo is a nice enough light that a Supernova / Schmidt Edelux might be an improvement, but not an incredible massive improvement. I'd personally give the Cyo a few years to age and possibly jump in on one of those premium types once the gap has grown again.