I just picked up a BWS Party. I have used it only a few times so still getting a feel for how it wants to cook. So far it has been great. The Fat Boy will give you more depth space on the racks. Solid construction yet easy to move around, and the temps are spot on (using a Guru). The BWS line is a rib cookers dream. Did a few birds on it Sunday and they were even more moist than the BGE produced.
Shame the Party can't hold more fuel and water casue if it did i could forget it till the product was done. Very happy with it so far and I only expect that to improve as I lean more about it.
BWS Party, UDS, Yellow Thermapen, Gasser