I would say it also has to do with whether you want a more upright position or not.
I have had the Jitenshas on a Quickbeam. They're good, narrow urban bars. The Postino bars are the same shape and design I believe, but a little wider which would be good if you're mounting shifters (and since the QB is single speed I went with the more narrow Jitenshas).
I wanted more upright and and reach so went with Albatross (really I liked the Jitenshas but needed the reach to get around a stem mounted child seat, but now i really like the albatross better). Not familiar with the MAP.
But...since you asked the thread, you're going to get recommendations on things you didn't consider, in which case I'll throw my .02 in on the Boscos. I test road a Clem at the shop with those and it just felt right, like the bike and handlebars were meant to be together.