Orly made a decent stab at mattes. I'd call these an eggshell finish, rather than OPI's hideous flat finish. They manage to have a bit of depth and not look like if you scraped your finger over these it'd sound like fingers on a blackboard. That said, they're a sophomore effort and nice, but I'll reach for other mattes first. But they're decent polishes, and I am in no way horrified by them. They have a beautiful formula, not gloppy or sticky at all, and you have plenty of time to get them where you want them before you dry. they take a tad longer to dry than other mattes, but in my opinion it's well worth it.
Also I wanted to say a word about basecoats and matte polishes. I ALWAYS use base coat. not only does it improve adhesion, but it fortifies my thin nails, protects them, and - this is hugely important - smoothes out my ridges. Every picture I have ever posted of matte nail polish, and there have been many, I am wearing base coat. It in no way harms the polish's ability to give a lovely matte finish. So don't be scared to wear basecoat with mattes.
Orly Purple Velvet is my favorite, a reddish purple with a nice depth.
Orly Blue Suede is a great light navy shade which we've been lacking in mattes.
Orly Matte Vinyl is your standard black.