I use tidy Cats multiple household. (actually the cats use it) I am fairly satisfied with it but it is a little dusty. My grocery store only sells regular name brands and I shop there because I can't to get out early enough to hit the pet stores.
I want to try the LiterMaid thing but I'm not sure the cats woud use it and it's awfully expensive!

One piece of advice, do not use Arm and Hammer! It is sooooo dusty. And it tracks too. I know, my fiance is allergic to dust. (he's allergic to cats to for that matter)

I'm thrilled to be engaged, but the logistics of this could be a problem. Neat-freak boy who is allergic to everything meets slovenly cat loving girl. This could be interesting.