Ditch the cardio. Sprint once every ten days.
Your barbell routine is all you need - I am at about 8-10% bf, and all I do is eat primally, do strong lifts 5x5 once or twice a week, and get my ass to a yoga class as much as I can (1-2 days/week). And ditch the white potatoes man, they are useless. Have sweet potatoes or go fully primal.
You'll find doing less will help. You are far too fatigued.