My bars have an effective width of 750 and I'm quite tall and have more of a stretched out XC riding position... bar width really depends on preference and riding style, and you need to consider stem length as well unless you just want longer bars.
I'd agree with the others, DMR deathgrips are quite well regarded but i'm not so sure about your pedal and bar choice.
Superstar flat pedals are good, or if you want to save a bit of weight, have a look at the nukeproof composite pedals; https://www.chainreactioncycles.com/nukeproof-neutron-evo-electron-evo-flat-pedals/rp-prod122950
For bars, again, as above, look at something from renthal, raceface or something
I'd agree with the others, DMR deathgrips are quite well regarded but i'm not so sure about your pedal and bar choice.
Superstar flat pedals are good, or if you want to save a bit of weight, have a look at the nukeproof composite pedals; https://www.chainreactioncycles.com/nukeproof-neutron-evo-electron-evo-flat-pedals/rp-prod122950
For bars, again, as above, look at something from renthal, raceface or something