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Thread Starter 
I'm real new to this but a quick study.

With the Cable STB the standard def is terrible. It connects via HDMI to the TV but I think it does not upscale standard def at all. It seems to never match my TV native like.

What can I do short of a new AVR or something that costs less. I love the audio of my current Onkyo non-HDMI receiver.

My stuff.

Comcast Scientific Atlanta Explorer 4250HDT cable box.
Onkyo TX-SR800 AVR - No HDMI.
Hitachi 42HDT52A 42" 1080i Plasma TV with two HDMI inputs.
An RCA DRC8060N DVD Recorder with HDMI & Component out
A Samsung BD-F5900 Blu Ray player with an HDMI out
An Onkyo DV-SP800 DVD player Component, Analog, S-Video outs.