Use a NEMA enclosure and mount them to a copper plate, which is also connected directly to the ground is the best thing to do. This gets you started on putting in what people call a "SINGLE POINT GROUND" system which is a good thing to shoot for.
Get a box that will hold two of the ICE units because you know...once you have one antenna....your gonna want another.
DX Engineering has some nice ones, I used one almost exactly like what they have....I ordered a pack of the waterproof cable feeds from them that they use on their boxes and they work great.http://www.dxengineering.com/Products.asp?ID=212&SecID=112&DeptID=19
Their box is not a bad price, but I found one surplus that worked for me.