Dave Upton's Veracity HT2-TL review suggests that the HT2-TLs need a decent amount of room to breathe - 3 feet from the back wall in his optimal position. I have the Std. STs and am looking to upgrade to the VSTs. Do the VSTs and HT2-TLs need more room to breathe than the Std. STs? My STs are currently about 2 feet from the back wall, but they can't be moved out any further.