I like to listen to jazz, some classical music, R&B oldies- Aretha Franklin, Marvin Gaye, Stevie Wonder, Earth, Wind, and Fire, Sly and the Family Stone, Celine Dion and the like. But I read all the good postings here and wonder if my system is enough to get the optimum sound from all the different music I listen to. I'm on a tight budget so I'm conscience of costs. Any advice? Current system Yamaha RX-V461 Receiver, Sony DVD NS55P, Boston Acoustics CR67 front, CR57 rears, and Center B/M MRCB Micro Center, Sony 8" sub. with neightbors I keep things at a medium roar but like Sly loud. I am wondering if I need a larger sub or need a Boston sub to replace the Sony. I was told the Sony was okay. Just wondering if I need to upgrade, if so to what????