Stick with Elkas or Works, etc. for Duning.
If you pretty much dragged flat ground, (or hill raced) where jumping was really not an option, I'd say go with Marvins...
Comp series get a bad name because they come with thick oil and stiff valving from the factory.
With a lighter oil, less/more nitrogen and a different shim/valve stack, they can actually be a pretty good shock.