I like BJs LB ribs, in the two-pack. Very tasty and meaty. I've only had one of their PBs, but it was quite good. My local BJs doesn't sell packers, but their larger, thicker flats are pretty good.
The only meats I buy at Costco are lamb racks and pork tenderloins, not for the smoker. Their prime steaks are really good but $$$.
Good to have you back on the forum, Max.