I've had three different types of handlebar in the last 6 months – Burgtecs, Sunline V1s and have setteled on the Renthal Fat Bar. To be perfectly honest, I cannot remotely tell the difference between any of them. They have all been more or less the same width (750mm or thereabouts) and the rise has been 20-40mm. But even so, i just can't tell the difference.
Once you've figured out what width WORKS FOR YOU (NOT ANYONE ELSE) then it's more or less a matter of what you want to spend and what you like the look of. I'll be honest and confess that I've been changing simply for cosmetic/brand reasons.
The only objective comment I can add is that the Burgtecs flexed a frightening amount, so much so that you can clearly see them moving around 10mm either side of horizontal. It is very disconcerting when you see it.