Acme Tow Dolly with Hydraulic Disc Brakes?

That's hard to read. Go here http://cartowdolly.com/compare/

Once you get to the website click "Click Here to Download Detailed Comparison Chart in PDF Format"

mowermech wrote:
Personally, I do not like the Acme dolly. ...

Elaborate.

Here's an information sheet I downloaded on the tow brands

Personally, I do not like the Acme dolly.
If I were to buy a new dolly, it would be the American Tow Dolly:
http://www.americancardolly.com/
Note that they deliver right to your door, free, and make sure you know how to set up and use their dolly. I like that service!
Of course, if money was no object, I would get the latest and greatest DEMCO Kar KAddy. IIRC, the price is just a little over $4000.