Is Sasuke ready for Itachi?
Or does he still have some work to do? He handled himself pretty well against a strong Akatsuki opponent. His battle prowess is definitely top notch. Here's my very simplistic breakdown in terms of basic abilities:
Taijutsu: I think Sasuke may have a slight advantage in speed and close range fighting ability.
Ninjutsu: From what we've seen so far, Itachi has plenty of jutsus and some pretty powerful ones, like amaterasu. Sasuke's shown a lot of development in this area, but I doubt he has the repertoire of Itachi.
Genjutsu: Sasuke's much better in this department as well, and apparently has the potential to surpass Itachi here. But still no MS, unless he considered Orochimaru his bosom buddy.
Sharingan: see Genjutsu. However, Sasuke may upgrade his sharingan in ways other than genjutsu.
Overall, I think he'd lose now. But I also think he's very close to surpassing Itachi.