Killen's BBQ in Pearland. (All photos by Jim Rossman) I had lunch at Killen’s BBQ in Pearland today and the meats were spectacular. I have no doubt Killen’s is the best BBQ in Pearland, and likely the best BBQ in the Houston-area. The Posse will double-check my thoughts as we head down to Houston for a BBQ tour at the end of June and Killen’s is a highly-anticipated stop. I figured Mother’s Day would be a light day at a BBQ joint, but then I remembered this is Texas. Killen’s opens at 11 a.m., and at 10:05 a.m. I was…