Why do I keep blowing head gaskets?

Well, I'm being told by the modern Hemi folks that for hi compression Gen 3 's the gasket to go with is the Cometic MLX series. I can get them for $108.00 a piece in about 2 weeks, or get them right now for almost $300 a piece. Going to put a Fel Pro in there right now and finish out this season with it, then look at the Cometic MLX over the winter.