Well, plenty of people run Echo bars, so that must say something, I remember Tarty and Olly C looking into whether the position that flat bulge bars puts your wrists in can give you any permanent damage to your wrists. Though Monty have kinda ditched the flat bars for risers - maybe they know something we don't. Still though, try to have a go on lots of peoples setups, or if you got couple of good riding buddies, switch bars with them.
Do you have a trials bike or is this research for building up a first bike? If so, good thinking, I wish I did the same when I was starting out!