I'd go as wide as teh competition would let me.. but for a different reason..
"""As a general rule, most powerlifters will use a wide grip, shortening the distance the bar must travel and reducing the necessary work to lockout the weight.(10, 36) A narrow grip enables lifters to generate more force initially, but hinders force production at lockout. A wider grip has been shown to limit initial force production.(31) It is also worth noting that a wider grip generally allows far less horizontal bar displacement than a closer grip. Contrary to por belief, a wider grip does not stress the pectorals more than a closer grip, although the triceps are recruited to a much greater degree with a narrower grip due to the greater vertical displacement of the bar.(10) While there is no greater recruitment of the pectorals secondary to a wider grip, the muscles will be subject to a greater stretch, which can result in increased force generation.(19)"""