I'm looking to purchase the Samsung HCN436W RPTV in a few weeks. The downside to this set is there's no room on the top to place a center channel speaker. My center channel is a Polk Audio CS300, which I believe is close to 20lbs. I've seen center channel shelves such as this one. http://www.futureshop.ca/catalog/pro...2&WLBS=fsweb13 I'm just worried it will place too much extra stress on the back of the TV. Does anyone have experience with these shelves and RPTVs?