Hi guys. I currently have Mordaunt bookshelf speakers as my main and centre speakers on my surround system. I have a media centre pc as my source for movies and music. I have an 8yr old yamaha av amp. I want to upgrade to floorstanders and replace my av amp. I would also like to get an amp just for audio, so my question is, can the main speakers be run from my av amp for movies and also a power amp for audio ? My amp is a yamaha RX-V657 from 2005, is there an av amp these days that would do audio some justice ?