Hello all - the fireplace company can finish the front of my fireplace with cultured stone. It will cost about $50/sq ft installed for about 16 sq ft (they don't reduce the cost for the fireplace opening). So this will run me about $900. Is this a good finish or should I go for real stone? Also since this is a corner fireplace they do not have any material to cover the sheetrock on the top. Any recommendations for the top as a DIY project or maybe even use someone? The picture should clear up what I mean by the top.