Emerson is a good player, one the best what he does but, our management would be mad to add 31 year old to our team, when, lets be honest, we probably won't win Serie A for next two years or so. Players like Tach is a good rotational fodder, and nice mentor to have on the bench, because their dedication to the club and professionalism. Whilst I do think Puma is a good role model, the cost of bringing him would probably outweigh the benefit we will receive. We should just bring Tach to the team, and give chance to Rio Mavuba, who seems to be an interesting talent.
Zanetti, Tach, Mavuba, Paro might not make the grade at CL, but for qualifying CL, they should be competitive enough. I mean, beside, Roma, Inter, and Milan, there isnt a single team in Serie A with better squad of center midfielders.