Another vote for the CR720 cantis. I use them on my brevet bike and can't say enough good things about them.
Another one I've seen with my rando club, which looks similar in design to the Paul NR, is the Grand Cru canti from Velo-Orange. (Although the tacky Mafac old-school gold bling-y-ness of them is a bit offputting, they do work well.)
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"I feel like my world was classier before I found cyclocross."
- Mandi M.