i go wide- because its easier for me to breath...
i also don't sweat Aero too much- because i just do Kilos... and i think being at maximum output trumps maximum aero, especially when I'm only in the position a little more than 3 laps..
unfortunately my "wide" is limited by the width of my clampable area on my base bars- so its not super wide or even as wide as id have it if i could put it where i want it.