There is a great feature near the top, in the toolbar, called "Search" where you will find multiple threads discussing your question. You'll find that what might be perfect for someone might not suit you. Part of the choice will depend on your needs when you aren't traveling.
We tow a Mazda Miata, which won't show up on any "towable" list. It is just right for the two of us.
If all else fails, read the directions!!