Hi all, I have a Marantz PM4200 amp which I would like to add surround sound to. The amp is not that old so replacing it is not an option. I'm using Mission 772 speakers with the amp and I'm more than happy with the sound, I'd just like to add Dolby Digital and DTS, maybe even Prologic 2 but I reckon this might be outside my price range. I would like an amp that has 3 channels to drive the centre and rear speakers, I've found the Yamaha E800, but this is more expensive than my amp was. I'd like something around the £150 price bracket. Is this a good idea or would I be better off forgetting about it? Thanks a lot.