The L2 http://bikerholic.com/2010/03/19/first-look-forcefield-pro-l2-back-protector/ The Sub 4 http://www.webbikeworld.com/r3/back-protector/forcefield-pro-sub-4/ I'm planning to buy one of these but can't make up my mind between the two. I know theres about $50 difference, and thickness difference... Just wanted to get opinions of those who own either of them or have tried them? I'm buying overseas as I can't find anyone in Melbourne who stocks them to try They both seem really good... >.<!!