I've got the FX65. One of the most used implements I ever bought. Was great for clearing a forest of 12" x 60' pine trees 4 to 8 logs at a time. There's been a few times with big firewood trees that I wished I'd bought the next size bigger, but it's done everything I've asked, even if I've had to use a pulley to double the pulling force. I've got the clutch cranked down pretty good, so it's probably a 7000 lb winch.
Not just for logs. I use it a lot to "persuade" trees to fall in the direction I want (As a Plan B / safety backup). And if say a "friend" were to hang up a tree in another, it the safest way to pull them apart from a distance. I used it to pull bushes out of the yard from a 100' away without driving over and spinning up the lawn. To pull vehicles up on trailers. To pull....well....really anything and everything when you need to "reach out and touch someone". One of those "once you got one, how did you ever live without" tools.
Whether one unhooks logs from cable and re-hooks to tow plate depends on a lot of factors. How heavy is log(s) (do you want log to continue tightening cable on reel? And rely on brake to hold/take all that force?) How high do you want to get butt off ground? Are you pulling load from pulley above rear axle (wheelie danger)? Do you want to spend time re-hooking? How many logs are you trying to pull (choker chains getting messy/intertwined, etc..)?
With the little pines I'd sometimes put 4 logs on the tow plate them pull 4 more from the cable.