Juve are quality. They win games because of their midfield and solid back line, whereas we win in completely opposite ways. Whilst they might be a quality striker short of an outstanding team, we're a midfielder or two away from that too.
A game with Dortmund would be great for me, it'd be fairly 50/50 don't get me wrong but I think Juve would prove a tougher contest especially with their discipline and experience. Dortmund are still in their infancy with the exception of their goalkeeper and Kehl. They are definitely the dark horses though.
Matter of opinion really. I just don't fancy us against teams with those perfectly efficient midfields. I don't think Bayern are as invincible as some would make out myself, though when they get into their groove they are a tough nut to crack. I just feel a midfield battle on such a big occasion can win the game. i'm not saying we lost to Barca twice on the midfield battle alone, but it played such a huge role that Rooney, Ronaldo and Hernandez were starved of the ball over the two lost finals, and they were meant to be the matchwinners.
Personally though, I can see Juve going very far in this and wouldn't be surprised if they made it to the final. It's not a perfect example, but the way they absolutely destroyed Chelsea was incredible, though Chelsea just aren't very good this season. Personal preference is Juve over Bayern for me, though I'm not trying to shit on Bayern, they too are a top side.