I'm planning on shooting a slightly larger group and as a result I found an excellent article written by Rob Galbraith here:
http://www.robgalbraith.com/multi_pageb ... 0046-10396 Overall Rob's article is an excellent review of the different PLMs and might give you some additional ideas. Just a word of caution... as a result or Rob's article I ordered another Einstein and two 64" Soft Silver PLM w/ White Front Diffusion Fabric. ;)
UPDATE - I just read this post:
viewtopic.php?f=8&t=4192 and it looks like the "silver" PLM mentioned in the Galbraith article pertains to the
"Extreme Silver"