I got my 6020 thursday and had it set up later that night. Played around with it a little to get the HD/SD/PC signals at the right aspect ratio. Right now I have the picture at "Optimum" setting as it seems to be the best preset setting for me anyway. Don't have much time to tweak the settings over the next few week so will leave it like this for a while. Or until D-Nice posts some settings that I can try out.
So prior to the 6020 I have had Sharp 52D62 LCD, Pioneer 5050 plasma, Pioneer 433CMX plasma, etc. The 6020 replaces the Sharp in the living room and all I can say is the 6020's picture is impressive. It displays even deeper colors than the Sharp which I thought was pretty darn nice. The Pioneer's Kuro definitely stand out as I was never happy with the Sharp's grey'ish blacks which in addition to the blinding whites, bandings and occasional mosquito effect ruined my viewing pleasure.
Since I don't a 8g I can't compare the 6020 with its predecessor nor for that matter current plasmas from other manufacturers. Needless to say this is one impressive set and I'd be hard pressed to consider any other display at the moment.