I had a BADLAND ZXR 12,000 lb winch that decided to give up the ghost while loading a van.
I had to complete the task with a come-a-long. I still need to get it apart to see what broke. Perhaps a brake?
I had an unused BADLAND APEX 12,000 lb at home which I'm now using. The synthetic rope is interesting, but still seems to work.
I built a custom 1 1/2" receiver for my trailer, and the winch is removable which is a nice feature, but it is awfully heavy to lug around. Hmmm..
The Sherpa Stallion 25K is listed at 68lb (rope)/104lb (wire). Not too bad. The Prowinch 20K is listed at 136 lbs (or is that shipping weight?) A bit to lug around.
I haven't convinced myself that I need a 20K winch, but I would like some of the extra capacity so one doesn't pull it up to the max all the time.
As far as amps for the Prowinch.
12V x 450A = 5.4 KW = about 7.2 HP (rated at about 6.6 HP).
If you have a large 5+ HP motor, it will suck down the amps. Only way around that is with very low gearing.
Many winches will have a duty cycle, and won't be rated for full power continuous. Nonetheless, your winching will likely vary with power. So, you might hit 20K pulling your load out of the mud, or up the ramps, but most of it will be pulling at much less, unless you're pulling several hundred feet up a 45° slope.
I've seen two speed Ramsey winches, but that doesn't seem to be common.
Odd, there are two very different winches in the photos in that ad.
The basic winch looks similar, other than the integrated fairlead and wire cover. I do like the second a little better. It would certainly be worthwhile to verify what will be in the box.
They seem to list both 12V, and 24V. The 24V would be nice, but would need a little different battery and charging arrangement.
Hmmm, comparing the Stallion to the Prowinch 20K,
The Prowinch 20K uses 9/16" wire rope (14mm, 85 ft).
The Stallion uses 100ft (30m) of 0.472" (12mm).
Interesting different cable choices. A little longer lighter cable might be nice, but perhaps they're for different purposes.
So far I can do several winch pulls without draining my battery. So, a high amp load may not be a difference unless one really has some intense winching to do, and if one has a front bumper mounted winch, then one can easily recharge, or idle the vehicle as one's pulling.