Ive been doing research between Arnott Air Ride Suspension and a few others for my 2021 fatboy. Anyone have any suggestions on which suspension to go with?

 

You will get much better results in the 2018+softail section, good luck with your search. Welcome to the forum.

 

Went with Legends for my wife's Deluxe. Straightforward install. In the after picture the font forks have been shortened about 1.5" as well (with Chrome lowers added).
Pardon the messy garage on the before. You can see in her smile how much she likes the result.