I'm a fan of wider bar mated with shorter stem, the control, leverage cant be beat. I guess my bikes somewhat started off with more standard sized xc bar sizes, generally 100-110mm 6-deg stem and 680mm or there about's wide bar. On my HT 29er I now have a 90mm stem and a 710mm flat bar. My AM FS bikes have RaceFace Atlas FR bar @ 780mm and 60mm stem's, they simply feel superb, my SS rigid 29er has 80mm 0-deg stem and 740mm carbon bars...nirvana.

That added leverage has taken all the twitch and momentary loss of control sometimes given away to the front wheel when deflected off or otherwise "guided" off my intended path by an object on the trail and has firmly put the control in my hands (Hope that is somewhat understood).

Every now and then when rolling down a steep and rocky descent I sometime feel more controlled (steered maybe is the right thought) by the circumstances and elements I'm rolling thru, over, across and can be left more or less holding on and going along for the ride. The wide bar/shorter stem has given the reigns of control for those scenarios back to me and it feels great.