Thanks. Regarding the cable, I tried a Tributaries RCA digital cable and the DHLabs Silver Sonic D-750 high performance RCA digital cable, which was very good, but neither out performed the stock DIN cable. It's hard to beat IMHO.
Phone photos are not very good. But I'd take multiple photos, wide and close up with midday light and a very steady hand. Then choose a few that are the best, with minimal off-center cropping and blurring.
I do like your selection of equipment and media racks.