Just to follow up, I went with a new AIO3 injection filter with katalox lite and a 48k softener, both with Clack WS1 valves. Iron is gone post-filter and water is crystal clear, but I will monitor for a while with a Hach IR-18. pH is high, as many have experienced and mentioned, and that may/should subside over time. Once the pH is settled a bit, will have the water professionally tested again. I have a fairly sensitive manganese test kit coming as well to check that.
I'm backwashing the filter (10x54 Vortech with 1.5ft3 KL) every other day at about 9 gpm for 14min. My water is fairly cold year-round (~10C).