I'm looking for advice on upgrading my speaker system. My Home Theater System is Powered by a Marantz SR5008 running Klipsch RF25's, RC-25, and four RB-25's for surrounds. Purchased in 2005. Room size is 14 X 22. I am wondering if upgrading my system to the new RP line (RP-6000F, RP-404C, ....) would give me a noticeable improvement in clarity or not. I'm having difficulty hearing softer conversations parts on TV and movies without turning up the volume too high. I am hoping the upgrade would help that or maybe as I am getting older, 67, my money should be better spent on hearing help.