While I try to avoid paint snobbery, I have never liked Marballizer over the time I've been playing. Never.
I've been using Redemption and have been happy with it. I use a 0.680 insert when it's fresh, then 0.685 after it's a few weeks old. It's usually very consistent, breaks on target, and I don't have any in-gun breaks (other than those caused by broken detents which I failed to notice). And it keeps fairly well.
Oh and the green stuff leaves a really nicely visible mark.
"Accuracy by aiming."
Definitely not on the A-Team.