A lot depends on who you are cooking for. I have an 18.5" WSM, a performer, + 3 kettles, and have been cooking on Webers for 30+ years. Since I bought my Akorn in March I haven't used any of them. Mainly I cook for just my wife and myself.
Some advantages of the Akorn are they are not as susceptible to wind and cold. Because of the design I feel comfortable having it on a wooden deck off of my kitchen without worrying about causing a fire. And it is a fuel miser.
WSM, Green stainless Performer, Genesis 3000, 2 18.5" Weber kettles,
Hunter's safety orange Thermapen.