Cooper's in Llano is one of our favorites. We stop there every time when we go to Fredericksburg. It's one of the best but I wouldn't say it is the best. There's a lot I haven't tried and until I do try more I'll just say its a favorite of mine.
My recommendation is one of the lump reducing rings, the XL Woo2 and a XL sized pizza stone for indirects using the XL Woo2. These are the XL accessories I use the most. Your mileage may vary depending on what and how much you cook.