I have decided to go with some FatMat and am willing to completely strip my car and lay down a couple of layers of this stuff. This means every inch of the floor and in the doors. How much of this stuff am I gonna need?? 100 sq/ft on ebay is $100 and I figured 2 of those should work but I dont want to get half way thru the project and find out I need considerably more to complete it. Also any other suggestions on sound deadening materials is welcome b/c im dont dead set on this FatMat.. it just looks like a good deal compared to dynamat.