shocks: stock or aftermarket?

Hallo everyone! I just need some advice on how the qualities vary with the manufacturer and type, and which ones would you suggest? Now, my rear shocks look gone, so, I have the choice to get the stock ones from the dealer, or look at some aftermarket stuff. If I want to drift the car, how important would be the stiff rear shocks, and what would be the good plc to look for thm? Or just get the stock ones, springs are the same anyways…