John,
I own 2 682B Manfrotto monopods (the 681B is the same but w/o the additional 3 legs). I have used them with Nikon D3 and D3x bodies, the 200 f2 lens, the 70-200 f2.8 lens, the 300 f2.8 lens. One has a Acratech Maxi ballhead the other a Kirk BH1 ballhead since I use ACRA plates on all my lens feet and the D3x. I loved the first one so much I grabbed a second since the 200 f2 is married to one for a quick gun and run set up.
Thanks. I didn’t know there was a monopod with expandable legs. I just ordered the Manfrotto 682B from Adorama. No time for me to do any serious looking and comparisons and have it on time with standard shipping.