Cane Creek makes these barends: http://www.canecreek.com/component-o...t=ergo-control
I've used a couple of set of em thru the years.
they are nice and ergo, designed as such, and work very well.

my caveat with right angles, and rubbery/grippy parts, is that they often catch on things, like passers by
its easy for the grip to catch on a jacket or any loose clothing.

i know it sounds lame
but i was constantly amazed how often my bike(s) would get knocked around, simply because someone was curious and looking at the bike close by, where their clothing would just rub against the bar, and it would be enough of a catch to start the bike sliding
i know... lame

however, with a bar like the H-bar, Mary Bar, Open Bar, etc... the sweep is enough to allow for "glancing blows", and/or let things simply slide along its surface.
the wrist angle between a straight bar and bar ends/or road bar's (drop/hood)