It a tough call
We have both a KJ and a BGE dealer in the NT
A friend of mine was in the market for a Kamado a while back and had the choice of the two.
You get more fruit with the KJ but that's only a positive if you plan to you your Kamado to its full extent
If you mainly plan to use it as a smoker/charcoal oven then the DnC system isn't really a huge plus (he also has $5k worth of Beef Eater Gas BBQ)
The KJ hinge is good as is the top vent and fire box but again, is that worth the extra coin?
The local guy here has a package with a XL BGE (same size as the BJ) plus heat deflector, CI cooking surfaces and a Table to put it in for the cost of a BJ.
Its personal preference, if I had to do it all over again I'm not sure which way I'd go, but I've also been spared any warranty issues (aside from the top vent). That having been said, I recently put a deposit down on a BGE MiniMax over a Joe JNR.
For the record, the friend who was shopping for a Kamado went with the KJ when BBQ Galore had a 20% all stock sale over Christmas. Kinda hard to pass up that deal
I would consider re-living the high school drama for wings that look that good! I bet they were a hit with the family. Can't think of a better way to kick off such a special event.
Congratulations to both you and the graduate!