Have 2 Sunset K-36, both run smooth, one of them survived a 1 meter fall with only minor damage, and still runs well. They seem to be almost immune to dirty track, and have a lot of oomph.
My 2 Sunset K-27's run also well, I've had the same problems as Cameron, those shorts are (once located) easily fixed, they're a bit to light for my taste.
Sunset's K-28 is also a good runner, though a fast one.
Compared to my PSC models, the Sunsets are cheaper, more robust,and can handle tighter curves.
Boris