Pathfinder Hitch type?

[Ductape Dave]

Hello, new to the forum, just bought a 2003 pathfinder (awesome)and plan on towing a 3000lb trailer now and then. Been looking at hidden and reese hitches but needed the experts advice. I plan on the class III, 2" receiver.

1. Which is the best hitch to buy?

2. Round or Box and if your can supply model Number.

3. Anything I should be aware of while towing?

Thanks for your help! Dave