Is there a comprehensive list that compares the many different long arm brands, models, options and pricing offered by an objective source? You can find such lists for camera equipment, automobiles, and other items but I have yet to find one for long arm machines.
Thanks for any help.

never heard of one, I think most of just do research one by one, that is a good idea tho, too bad , they might all sell more if it were easier to figure out how they compare.
I know a lot of the dealer have a comparison list between their different models but not other brands

Check out this website
http://www.longarmuniversity.com/index.htm