Which strikers should Manchester United invest in this season?

I think Darren Bent would be a good buy, i think that fergie needs to get rid of all of our ******* **** and/or useless midfielders (gibson, carrick and, controversially, ji sung park, are completley expendable) and purchase one or two quality strikers. My perfect selection would be aguero or falcao, both leaving their clubs in due time, but thats just a dream lol :)