Carra is 29, Hyypia is 34, Finnan is 31 (I think), and Riise/Aurelio is 27-28. Like I said, not urgent 3 seasons ago, but now it is. As much as we hear about Sheringham playing till what 39-40, the majority of players in the top league play at a good standard up to 30-35. During that period they either retire or move on to smaller and less competitive teams or leagues.
Kewell is a Rafa favourite I agree, but I am fairly certain that if Rafa can get someone better, he would have.
As for Benayoun, to me he is definitely better than Smicer as he is more effective. But I suspect he is more directly a replacement for Garcia, in which I do think the jury is still out.
Yes Benayoun is more consistent, playing around 7/10 nearly every match. While Garcia ranges from 2/10 to 9/10. However, man what great times those 9/10 were.
As for your striker question. Kuyt is definitely more intelligent than Cisse or Baros, and can follow instructions. Its not as if their record shows that they scored consistently more goals than Kuyt. If you want, they probably have similar scoring records, but Kuyt brings more to the team.
Voronin is not scoring as many goals as when he started the season, but even if we regard him as the same standard as Baros and Cisse, the fact that he is free makes him a better buy IMO. He has good movement and you can tell by his runs and the stuff he attempts, that he is an intelligent player.
I do regard Voronin as superior than Mellor. As other clubs who have taken Mellor on have found out, Mellor is not really mobile enough to be a striker. No doubt he has the scoring touch, but at his age, he should have been the finished product, but is yet in under development stage.
While I do agree bar Torres our strikeforce probably isn't much better than in 2004, thats not entirely by Rafa's choice is it due to the budget? Probably the only thing if you want to fault him for is buying Morientes instead of Anelka for 6-8 mil 2 seasons ago. But hindsight is always 20/20