If I only had 1000 to spend. It would be a Lepould VXIII 6-20-50 side foucus with the M1 knobs installed.
With that said I had a VXIII 6-20-40 with the M1 knobs and just replaced it with a Nighforce 5.5-22-50 NP-R1. I can tell you the price hurt but now that its on there i am very happy.
I was having questining the repeatablity of the leupold and having doubts is no place to be come hunting season. I lost 3 moa some place.. I think the M1 knob slipped. It was my fault probably not having it tight enough.
Plus it gave me a great excuse to just buy what i wanted in the first place.