I haven't ordered anythihg yet, but I'm thinking about a new condo from one of our forum sponsors. You probably can't go wrong with petsmart and petco, or maybe dr fosters and smith.
I got those from Laureen & have used both several times. I am always happy with my order! To top it off, epetpals lets you order by the can, not the case. You can try some new things then.