I have the rotisserie spit and the basket, I’ve only used the basket twice but it was really handy for cooking a large piece of meat. And just get the bigger of the two moters that way you’ll never need more power
I have a 32 and I can assure you, tiles cook much better food then those silly pebbles. You have to keep in mind that pebbles are simply broken tiles. And as far as lump goes you’ll get different answers from everyone but the best advice I can offer is just get the best you have available local. In my case I have my local Ace Hardware get me wicked local or Rockwood if wicked isn’t available. Anyways welcome to the obsession 😁