Currently, I think, Manchester United is the best team in Europe. The Premiership title is almost secure, after last weekend's win over Everton and Chelsea's draw against Bolton. The FA Cup and the UEFA Champions' League is another story.
In the Champions' League, I believe that United will eliminate AC Milan in the semi-finals, and I believe that Chelsea will be their opponent in the Finals. the problem is, United also faces Chelsea in the FA Cup finals only 4 days before the Champions' League's finals. I don't know if United is up for two wins over Chelsea in 4 days (Even though I very much hope so). Therefore, I think that United will focus mainly on the Champions' League, and maybe that will ruin the Treble for them. Let's hope it doesn't.