I dig my 38s. I don't think i'd go smaller that that for riding around traffice here in downtown chicago - that could get a little hairy. I like narrow bars - it just feels better on the Velo. I like my arms bowed out a little bit, not stretched out. It just feels more natural.
I picked up 36s. I;m 6' and have reasonably broad shoulders (though breaking my collarbone may have made them a little narrower haha). It was a matter of getting used to them as i switched from road drops. Now I don't even think about it. The only uncomfortable thing about the bars is riding the millions of unpaved streets around here **** the streets dept-at least they can't tow my vehicle