I purchased a pair of Exus SM100 shoes on ebay for 15$ NOS, which is the same as the Exustar SM100s currently available, just with the old company name. They are quite walkable/runable, fit well, and are damn cheap.

I also had a good time with the Specialized Taho and Sonoma shoes, both of which have good recessed cleats, and are good for walking around in, and they look pretty normal too. In fact, the Sonoma would be quite stealth around town. Reasonably priced at around 60$ each.

peace,
sam