The Serbian international centre-back has become an integral part of the United back-four who have broken all records this season in keeping 14 consecutive clean sheets in Premier League matches and should be a leading contender for his season's Player of the Year award.
"I was talking with Liverpool," Vidic has told The Independent newspaper.
"I was very close to Fiorentina, then Liverpool and after that Manchester United.
"Definitely I made the right choice.
"At that time it was a hard choice but when you look at it now with the three years we have won many trophies and I play regularly.
"Liverpool started the meetings, then they stopped. If I had stayed at Spartak Moscow I would have had more money than at United because they offered me more money to stay.
"Professionally, to go to Europe, United was the best choice.