Hey ken, I am not sure which one you are wanting, but as a person who has owned the original shallow pan(SJ Lid), the new deep pan (SJ Bowl), as well as the ECB Charcoal bowl replacement pan mod, here is my input:
I like the deep bowl the least. It really is too big, and does restrict the amount of coal you can add if you are looking to REAAALLY load it up.
The original shallow pan is ok, but will not hold much water of course. HOWEVER ... 95% of my WSM cooks have no water in the pan. If you are going to be buying a draft controller, most of your cooks will probably be dry too I would presume. If that is the case, the shallow pan really is fine.
The ECB charcoal pan is my favorite and most versatile. it is larger than the shallow pan so it could hold water if I wanted it too. I have not measured the volume but it must be close to the volume of the new large pan. And it has a flat bottom which serves two benefits: keeps out of the way of the coal a little bit, and can be placed on a table without wobbling.....
YMMV.