Salsa La Cruz 51cm C to C; Hope/Mavic wheels that look great (to me). Set up as a flat bar SS (magic ratio), but Easton drop bar switch if you prefer. Also, can consider gears since the bike has a derailleur hanger. Will part out if necessary.
I love the La Cruz... I've had two of them and a friend of mine has another! Great geo and fantastic OX Platinum tubing. Would be an awesome SS cruiser in that set up!