Rockenwagner's new place is called Three Square and is good but less fancy/comfortable than Joe's if that matters. Hal's also does a nice brunch and falls somewhere in between the two in terms of comfort and degree of fancy.
Joe's has a tremendous brunch, so go with your first impression. 3 Square is a also a good place, if you want a more casual brunch. Some interesting items on the menu and Mueslix (with milk) which I love.