My 66RC2X were well worn in when I got them. After an seal / oil change and general clean up, they are by far the best forks I’ve ever ridden.
As far as forks and shocks go, I’m more of a ride-by-feel than understand all of the jargon type rider. I couldn’t tell you about compression (high or low speed), rebound etc.
I do know that they just feel awesome.
From everything I’ve read, Marzocchi forks are a little like Brooks saddles. Not great to begin with (while bedding in), but get better and better and better. Mine are, I’d guess, 6 years old. I’d be gutted if I had to replace them with anything else. The only downside is their weight. Mind you, they were marketed as single crown replacements for triple crowns. Maybe their smaller forks are less weighty.
I say, go for it.