I love the MDF buildings from Litko. A year or so ago, they released six new ones. You can find information about them at ww.litko.net/categories/Main-Street-%2828mm-Building-Kits%29/ . The old ones are here: http://www.litko.net/categories/Terrain-%26-Buildings/28mm-Buildings/ . I have three of the new ones. They are a bit more expensive, but they are high quality and have clear plastic to put into the windows after finishing construction. These will look great in my town of Granville for my Pulp games.
I put the last three on my Christmas list and hope to assemble them by Historicon, so I can run a couple of Pulp games with my expanded town. I highly recommend these kits for their quality, ease of construction, and final appearance.