Really interesting thread, some great posts, i have the same recession as OP, and i've been quoted 3200 as well, at the end of the day I think a strong hairline kings crown any day of the week as the frame of the face is imperative.
Long term wise if 1/3 of your hair requires 3k, then 7-9k donors is all you need..
I do think you should go see a local hair surgeon and get a donor graft count tho to ease your mind.
or perhaps you should record a video of your donor region and comb through it up and down and send it to a surgeon who would give you a good estimate.