Not sure where you are getting your noise foam, but
www.mcmasters.com has a seleciton of noise foams at reasonable prices. A couple of them are pretty good for our use.
That is one powerfull pump. It will be interesting to see how see works for you with Cathar's new Storm CPU block. Is the Storm the only block you'll be running or will you have GPU & ???
With dual rads & 2 or more blocks it should be plenty of resistence for ya.