Didn't mean to budge in, but going with your discussion, I also had a point to make related to Pato.
Concerning our defense, I'm beginning to agree with San Paolo. For the upcoming season, we're pretty well covered in defense. Watched the game against PSV and was delighted with Kaladze's performance albeit them not playing with the likes of Farfan. I think its safe to rely in the old guns (Sergi, Cafu, Maldini and Favalli) for one more season.
I'm not keen on procrastinating any transfers for the January window, but if younger defensive replacements will be available then, I think its a less competitive window since some players would be cup tied. Which is the primary reason why I'm against waiting till January for the acquisition of first team players ala Ronaldo.
In central midfield however, I agree with Pirlo Fan. We had a fully fit squad heading into the Old Trafford Semi Final, yet when Gattuso had to leave the pitch, we lost domination of the midfield. We never did get around to covering up Vogel - yes I know, fringe player ... but a capable one at that - and with Clarence now primarily being employed further forward, there's room for a decent central midfielder.
In attack, as much as I'd like to see us sign another forward, I'm not sure whether competition from four other forwards is the atmosphere Pato needs to develop. This is why I suggested elsewhere that we should move for an attacking midfielder/winger and play the first half the season with three forwards - rotating between the 4-3-1-2 and 4-4-1-1 when necessary. Not only would the attacking mid/winger give cover for Clarence and Kaka' in the 4-4-1-1, but when Pato would be eligible to play, wouldn't be a direct competitor to him + could be used in other positions making us more versatile. If the addition's a winger, we could bring him on as a sub ... giving us more width - similar to what Sergi used to be before moving to LB.
We could also do with a younger promising GK in our ranks soon.
All in all, what I'd like too see are two more signings ... a central midfielder and an offensive midfielder or winger. Both of good quality + ~ 25 years of age. Another reason why we won the UCL was because Manchester had ran out of options at the back + Chelsea had defensive + midfield problems of their own. A long season is bound to take its toll. You'd be surprised at how much a player or two could vastly increase our depth and options.