ASC ISO system vs. GreenGlue

I've read through things and figured out why QuietRock and mass loaded vinyl isn't the way to go compared with good old drywall. So I've narrowed my decision down to 2 different approaches. I have a smallish room (11x18 with 7' ceilings) that I want to improve sound isolation in. 3 of the wall are concrete with wood paneling. The 4th wall is drywall. Ceiling is drywall. There is no insulation in walls or ceiling. My plan is to rip all of that down, and frame new walls off the concrete walls. I was thinking of using either: - ASC's Iso Damp approach http://www.asc-soundproof.com/newpages/isodampultra.htm. Basically using RC with 2 layers of drywall with gaskets and pads installed between the RC and studs and between the 2 layers of drywall. - GreenGlue's approach. Which is similar in that I'd put RC on the walls, and then use the Green Glue between the 2 layers of drywall. Anybody have any thoughts on which would work out better? To me, they both seem to be going for similar approaches, but the materials used in the drywall sandwich are different. Thanks.

Stuben, sorry for the long wait - John's been having nightmares with ISP's, etc, and I've been swamped with projects. As to your choices, if you plan to use separate frames you don't need to spend money on resilient mounts - the separate frames will do better without resilient mounts. Just put your drywall on the separate frame with insulation held against the drywall by strapping every couple of feet across the inner side of your stud frame, this will keep the insulation touching the drywall for damping. GG will help this construct about as much as a 3rd layer of drywall, so for walls it might be cheaper to just use 3 layers - it's ceilings where weight factors can get ugly, and this is a really good place for 2 layers and GG. Also, if you can't do a separate inner ceiling frame then RSIC clips and channel will help isolate your inner ceiling leaf from surrounding structure. I'd looked at the ASC stuff a while back, and (as usual) thought it too expensive for what you got... Steve