HED has some great wheels. The Ardennes+ and Belgium+ are popular around here. I know many riders who have used Ardennes+ for road and CX racing.
I used to see a lot of HED Jets on road and tri bikes, but I think disc brakes have taken over and the benefits of the Jet design don't make as much sense anymore.

If I was running rim brakes, I'd definitely consider the Jet RC4 at $1300. But if you're on discs there are better options, like the Zipp 303s. (Does HED even make a disc brake version of the Jet?)