Early Saturday morning light hits the smoker area as pitmaster Tootsie Tomanetz works at Snow’s BBQ in Lexington. So we missed — widely — when we predicted last month that Killen’s Barbecue in suburban Houston would be No. 1 on Texas Monthly’s list of the Top 50 joints in Texas. But we applaud — loudly — the magazine’s decision this week to put Snow’s BBQ on top. In all the years the Posse has been touring, breakfast at the Lexington place on a Saturday morning remains our favorite trip. “It’s the ultimate Texas BBQ experience: great food, great people and the…