Sir,
I run both the M8000(new) and 8274(used,rebuilt) on my 40s.
The M8000 was about 800$ new when I bought it . I have about 650$ in the 8274. I would do the rebuild again if I had to choose between the two. I had to reclock the M8000 winch to mount it horizontally on my mount ,

job
Earlier in life when I had hair , I worked the sheet out of a 8274 ,I had on an old cj7 mt. logger/mud jumper P.O.S., before My first L/C. And I mean worked it hard over the course of about 10years . I would not hesitate to work this one that hard now.
I have never used the M8000 except to drag some downed trees that were uprooted.
Both are the about best that a normal person will ever need .
My 2cnts