I've read good things about Cortico, but I've never tried 'em.
I've used Felpro (they have 2 different gaskets), Rock, copper, and MLS (cometic).
Rock (sold by engnbldr) makes a good gasket.
MLS mult-layer-steel is a step up -and I don't think OEM is a MLS gasket in the traditional sense - you need a fine finish on your block and head to do MLS and get it to seal, so don't swap unless you know you're OK.
Here's a Rock gasket, ARP studs - and 9psi on pump gas, detonated a few times during tuning:
