Sun CR-18 rims (polished, not matte) are very good and easy to find in 590mm. As for the bars: I'd stick with North Road. You could even flip 'em over for a speedier ride.. Just be aware that if you use a non-Raleigh stem, you'll probably need non-Raleigh bars, too, as the clamps (though not the quills) are different sizes (see Sheldon's note here).