Bjk,
I'm not sure I can be much help at the moment. We have had only one plowable snow, since I bought the KFI Poly, and it wasn't much, maybe 4-6 inches of light airy powder. My home is in the foothills of the Rockies at about 6800' in south central Colorado, technically just on the edge of the desert southwest. My 2 previous rigs were Polaris Rangers (08+12) with 72" steel blades. I plow my 1/2 mile dirt (road base) curving rolling driveway and my neighbors. Additionally I plow around my house, detached garage, outbuildings, and 100'x100' pistol range.
In the past I have had to plow 3' of snow at least once and many many around 12" days. Figure my last Ranger was only 800 cc compared to the P1000. So, my best answer to your question, is I bought the KFI Poly. With only limited use, I am comfortable with my choice.
Keep us posted on your decision and experiences.
s/f Steve