Eugene wrote:

and switching to an emission poor system (chucking CRT for LCD would do plenty for starters)

Actually, that won't help you much: emissions from LCD screens can be easier to decode than those from monitors. Active matrix LCD screens create very strong and clear emissions--as long as a display uses some form of pixel sweep where each pixel is activated at a unique time, then the emissions are simple to decode. Though in theory LCD screens emit less than a VDU, recent EMC controls have greatly reduced emanations from VDUs--with the result that the graphics card will often be the greatest source of compromise. Hope that helps! ~Faustine.