RD, if you are trying to tell me that your 4200's have anything like a one inch eye box, I'd going to laugh at you. No way. For every guy you can find that claims that, I can easily refer to several with solid credentials that have tested them and found what I say is true.
While I've never owned one, I have shot with several. Again, no way they have anyhting like that much ER or EB.
I have owned, shot, and measured the eye relief and eye boxes of a Burris FFII. I do agree that at 6X and 9x, their ER and EB's are very much like your 4200's. But at 3-4X, the story is much different. The Burris FFII, 3-9X40 I measured had an ER of 4.1 inches at 3X, and twice the eye box as the 4200's I've played with. In my book, that would mean I'd buy the FFII over the 4200 Elite. E