I would rather see them win the Scudetto since the league games are played every single week of the season which means that if you're not winning in Serie A you have to go through hell every week when not seeing Juve on top of the table, not ot mention the pain of loosing the title in the final round like we did a couple of seasons ago. I tell you, that hurt a lot more than loosing the CL final to Milan last year.
I also think that Juve should focus on getting that third star since it, if i remember it correctly, was one of Gianni Agnielli's biggest dreams to see three stars on the Juve jersey.