Is it worth it

the reciever you have is a dolby prolodgic system. the rear channel is monoral, that is that both rear speackers have the same infomation to it (and not much of it). the new suround sound systems are dolby digital/DTS suround sound. there is a major differance to the sound and the information presented. all channels are discreat and information provided by you digital outputs of your equipment provide the channel info (tv via optical digital out, DVD also optial or coaxal digital out, cable box also optical.)