im looking to buy a autopot setup for my indoor se...

the bigger the better , depends on how long you plan to veg them, there's strength in numbers too afterall . Bigger pots, larger root zone, but you do end up needing several different size pots, what i'm saying is that's not necessarily either or, like you'll have to transplant at least once anyway. Autopots are okay, but prone to flooding and some genetics dont like bottom feeding as much , think about the size tank you'll need too as that could factor in on the size tent and the number of plants you have. Hope this helps ! 🚀