Hmnn. Ok, did some fast reading through my old college notes;
Sinaugua Kiva: basically, it means dwelling in rock. They kept their gardens inside their homes, which was fed water by a highly intricate series natural plumbing (I.E. they used the rock strata itself to divert water from artesian springs and wells) and then decorated this water system with live plants, beads, and intricate stone mosaics
Spirit Walker: I like the Explorer idea because of the fast move and gureilla. I'm not sure what str to give them though. But if this helps, all the 4 corners tribes greatly respected the Spirit Walkers as a threat, and even the Apache (famed desert warriors themselves) were careful of them.
Additionally, the Anasazi traded in highly ornamental bead work objects(baskets, clothes, blankets, etc) and dried foods of all types. So maybe some type of city square type building if you don't like the Kiva?
Here's an interesting tidbit for you folks; The Anasazi were a matriarchal society. The woman actually ran the political/trading side, and the spiritual side was run by The Great Chief, or men. They were polytheistic, and is believed to be the origins of the Kachina (or spirit beings) legends. Additionally, Kiva's were built with a cardinal direction and celestial events.