Hi islanderre,
You never mentioned which type of foam you where looking at, it's important to know which one it is, sydthebeat seems to think it's Icynene, this is an open-cell foam, if it's a closed-cell foam then this has very different characteristics than the information you where giving, for one thing it has over twice the value per inch than open-cell, plus it's also a vapour retarder, I have worked with these materials in the US for many years and while I do work with it here this is not a hard sell, but if you don't know the difference between the foams you just get bad press.