I've got an M8000 and it's been fine for every single winching situation I've ever been in. Double it to 16K with a snatch block.
X3 for me. I got an 8K also. It's a 23 year old Ramsey, but it's never let me down. Used it on 2 other rigs before my 80. Had a couple of deep cycle batteries that cratered on me, but that's another story.