Well here's a few things about the Curtis plow:
1. The moldboard isn't that high, so any storm more than 4" and it starts coming over the top.
2. The electric lift motor is very slow.
3. You have to use the dump lever to angle it, so you're reaching back there with your left hand all the time.
4. It's a pain to take on and off.
5. The RTV as a whole can handle a lot more plow. The Curtis plow is like putting a 36" mower deck on a 40 hp tractor.
6. Ground clearance stinks. it doesn't lift high and you get hung up all the time. I've never gotten hung up with the Boss, and I've pushed up some huge piles.
And I could go on and on. I know a lot of guys that have dumped this plow and went to Boss or others. It's just a real cheap option for plowing and is a pain. Once you go to Boss, you'll think you died and went to heaven.
For some reason the $3900 for the Boss seems a lot closer to what I paid.