FIrst, always ride what you like. The step thru frame, of which mixte is just one design are getting popular as city and commuting, recreational bikes. Both Rivendell and VeloORANGE offer step-thru bikes. Personally, I really like the look of the mixte the most of the step thru variations, especially the older classic French and English designs. I have heard from the elves of the remote road, that a mixte with a checkerboard on the seat tube and drop bars is wonderful. But they are real vintage.

Of the Rivendell and VeloORANGE bikes, the VO offers disc brakes if that is your thing, the Rivendell does not. That Linus bike is a sharp looking bike, and appears to have the twin thin top tube design...