I have a Yamaha's DSP-A592 amplifier currently and that until recently seemed adequate for my DVD set up. I am upgrading to a Plasma screen and getting a new DVD player courtesy of my insurance company. I would like a DTS system. Can I upgrade my Yamaha amp to DTS by adding something in between it and the DVD player or do I need a new amp? ALso, anyone got any recommendations on a DVD player circa £350-400? All advice gratefully received.