still not sure on the flat bar thing
It took me a while, but I prefer flats now on my 29er. I roll them forward a couple of degrees to give a little upsweep, they didn’t work for me horizontally. I suspect a lot of people try them horizontally and don’t get that.
They look mean once you get used to them. Like most things, eye of the beholder rule applies.
Tom Ritchey (I think) made a point that putting rise in bars is an odd thing to do compared to setting the stem optimally. Putting a rise in bars requires extra material compared to flat so they’re going to be heavier for equivalent width. I suspect the dominance of riser bars is more about visual appeal for “rawness” than any engineering principle, happy to be corrected on that though.
I’d say get some cheap wide ones and experiment. Cut down if too wide.
Edit: go on get the yellow ones! http://www.chainreactioncycles.com/nukeproof-warhead-760-flat-bars/rp-prod80365 (I have the silver in 800mm, they’re nice).