City are expected to seal a £27 million move for Dzeko from Wolfsburg on Tuesday, and McClaren is confident Dzeko will be worth his weight in gold.
"He will be ideal for City, especially alongside Carlos Tevez," McClaren said in the Daily Mirror. "That will be a very potent partnership, very strong.
"I wish him well and hope he fulfils his dream and potential there. He is a very, very good player and that is reflected in the price."
McClaren is confident the Bosnian will adapt quickly to life in the Premier League, although he admits he may need to up his work-rate.
"He is a big lad, strong and quick too," McClaren said. "He also has good technique, but most importantly he is a goalscorer who gets them with his left foot, his right foot, his head. That is what City are getting. He is a good buy for them.
"He is a good boy, but he needs to work harder now he is in the Premier League than he does at present - but he will adjust, no problem."