The two listed there will probably give you the same amount of performance, it's really just how you use it. eDead is definately another good name. I recommend dynamat extreme or cascade audio (<---partsexpress.com) because they're vinyl based. For tricky areas use the liquid deadener, for large flatter areas use the dampening sheets.
Basically if you have the cash, Second Skin is the way to go. If you are looking for the most bang for your buck, RAAMMAT is the way to go. Good, solid butyl-based deadner that a LOT of people haev really good things to say about. Me and my friend are gonna do a group buy of 3 mats at 62.5 sq ft each to deaded both of our cars.