I would start with the Motorhome Magazine RV Dingy towing guide if you have not already.
Beyond that, specific tow bars are a very personal choice, so hard to say which is best and what may be right for you. I would look at Blue Ox and Demco, these are some I like. I like the new Demco Dominator for a few reasons, not the least of which is the weight of the tow bar but also the way it stows and the ease of that. Also the safety cables being attached to the bar are a lot let of a mess than the coiled ones. I currently have the Blue Ox Aventa and it works great.
I assume you have a baseplate installed already? Typically, Blue Ox and roadmaster are the most popular for the baseplates. If not I would look there for the baseplate you need. Don't forget the braking system which is required in most states. Same thing there so many types of braking systems, but some popular ones are RVI, BlueOx, Roadmaster, etc... I have the RVI, which I like because its pneumatic and can deploy the brakes in a fraction of a second and does not need any specific connections from the RV to the tow vehicle.
Lot of options here, so please let us know how we can dig into things further.