Path of least resistance first... go HDMI.
The 83 came with one so there's that.
if it doesn't suit you... try another config.
I'm thinking the 83's video chip set came out after the 9.8 and is a different type... for myself I see no reason to switch from the above configuration using my Onkyo 805 via HDMI only.
The power cords for each can have a influence if upgraded from stock.