Love 'em all! I'd say get as many as you can!

Not sure about that hammock bed thing as I don't think it would hold up under the heft of my two - Mishi is big and heavy and Mitzi is little and "plush."

I have a sign hanging in my kitchen that states "This house is maintained for the comfort and convenience of our cat(s)." I LOVE having it, because it's SO true!

Oh, and what is that site?