Recommendation Wanted: Valve Cover Gaskets

I've been using a set of edelbrock gaskets on my 340. Steel core composites. I've had the valve covers on and off a ton of times with no issues and no leaks. I just used gasgacinch to glue the gaskets to the covers, nothing at all on the heads.

http://www.summitracing.com/parts/edl-7592

http://www.summitracing.com/parts/edl-9300