Oh boy! Here we go!
There are several shaker hood manufacturers, and all have their pro's and cons. Most buyers are very opinionated about their choice being the "best". It is going to have to be YOUR decision as to what that actually means for your purposes.
You have AFR which their supporters all claim to be the only "true" shaker as it does not use the factory airbox to route air to the throttle body and has an old type circular filter. It has a design that has the most direct route to the throttle body. Another advantage is their ability to change styles to a T/A type scoop or a Max air scoop.
Next up is Cervini's. They use the stock airbox location, but their own cold air box/system. Their hood are more pronounced in the rise of the hood. Their advantage is they are the only one I know of that allow use of the shaker as intended and a Magnasun supercharger, should u decide to upgrade for more power in the future.
Next is Danko. He manufactures the shaker so u can use ur stock aluminum hood or buy his flat like a Cuda hood or with a similar rise as a stock Challenger hood. He also uses the stock airbox location, but his own cold air system.
Next is Suncoast. They also use the stock airbox location. Their advantage is cost, as they are the cheapest in price. Their shaker has wings on the side that route air through the hood to the airbox.
Last is Mr. Norms. His is a faux shaker that attaches to the hood, allowing use of a procharger, KB, or other superchargers without a fit issue.
You really need to look at them side by side and determine which satisfies your particular needs and aesthetic look as each has a minor different look.