Do you already have a 5.1 surround sound system? If so what are the pieces you have installed? Do you have a Receiver or are you looking to have the DVD player be the Surround sound system processor as well?
If you have a receiver already and are just looking to have an optical out to the receiver and a HDMI out to the TV I suggest the Integra 30.3 as it has all the outputs you may need. It also has one of the best Video processors on the market.
Audio Video Experience Inc.