decide which one to buy
Nos está costando decidir cuál comprar.
We're having a hard time deciding which one to buy.
Nos es difícil decidir cuál comprar.
It's difficult for us to decide which one to buy.
Es difícil para nosotros decidir cuál comprar.
It's difficult for us to decide which one to buy.
Nos fue difícil decidir cuál comprar.
It was difficult for us to decide which one to buy.