Autohausaz has Elring for $5.62 each (L & R) and MB for $15.84 and $14.40, L and R respectively. I've got a set of genuine gaskets I'm going to put on when I get a chance; I've had a couple sets over the years, I think VictorReinz, and always had some issues with leaks. Could be from not torquing it enough (I don't have the right torque wrench and am paranoid of over-torquing), but if I'm doing it, the $20 price difference doesn't seem worth it to me.
Fel-Pro, I think, used to be a reputable brand, but I have had trouble with them. The biggest issue was on my old Fairlane: less than a year after I replaced the intake, using Fel-Pro gaskets, they shrunk and tore apart in several spots. That caused some serious vacuum leaks. I think I used Edelbrock gaskets after that, but whatever I used has held up fine to this day.