Trust nothing on luminous lanscape. He is definately not objective about anything.
I would keep the D-70 if I could but if getting into MF or even into LF meant selling it I would do it in a heart beat. I have not been doing LF stuff for long but it seems that I have a greater selection of films now than I did when I started, BW and color.
As for lens names and what the different initals mean I have no clue. Personally I think manufactures just slap an intial on a lens so they can charge more, but I know nothing about lenses except what their purpose is.