Not a level top tube and people either love the geometry or hate it, but I've seen the Breezer Venturi at ~$300 and a small or extra small might fit you just about right and be in a color scheme you like.
__________________
Bikes: 1996 Eddy Merckx Titanium EX, 1989/90 Colnago Super(issimo?) Piu(?), 1990 Concorde Aquila(hit by car while riding), others in build queue "when I get the time"