The smoothie wouldn't be a bad choice. I considered it recently when I was looking for a fairly inexpensive steel bike but I wasn't excited about the frame weight. They list it as 4 lbs for the 54 cm on their web site.
I ended up finding a virtually new 2009 Bianchi Imola frame on Ebay for $560 (same steel frame as the Vigorelli) and upgraded a few components for well under the price of a Soma. Steel frames (even newer ones) can be had for good prices on the used market.