have just ordered onkyo tx 875 reciever with hqv upscaling chip onboard which says it upscales everything to 1080p not just through hdmi connections.does this mean connecting my sd sky + box through opticle digital connector will upgrade it 1080p? or will i eventually have to invest in sky hd ? also have sony 1080i upscaling dvd player will the reciever upscale this to 1080p or will i have to upgrade my dvd player to get the best out of my system ? complete newbie to home entertainment all help appreciated