Torres took his tally of league goals to 24 by clinching a 2-0 win at Tottenham, edging ahead of Ruud van Nistelrooy's record for goals scored by a foreigner in a rookie season.
Benitez bought 'El Nino' for more than £20million from Atletico Madrid last summer, which appears a bargain for what the Spain striker has delivered.
"Always when you sign a player you do not know if he will settle down and how he will do in the Premier League, but Torres is a young player who is hungry and wanted to do well," Benitez said.
"Sometimes you sign a player for a free transfer and people say he is bad signing.
"Then other times you can sign a player for a lot of money and he does well and everyone is happy, so lucky for us he is a good signing.
"He is one of the best strikers in the Premier League and is the best for us.
"We had spoken about the record. After the last game he said he wanted to play in this one and score here."