Juventus vs Dortmund could be good.
It looks like Dortmund's form has turned for the better.
And can Man City rise to the occasion and beat Barcelona?
Arsenal should beat Monaco.
Bayer Leverkusen vs Atlético de Madrid might also be good.
I don't know much about Leverkusen's current form, though.
I'm really putting my hopes on the Juve-Dortmund game. Dortmund seem to be galvanised by the contract extension Reus signed. I think that they'll have too much for Juve over the two legs.
City vs Barca is actually the closest tie in the stage, IMO- I think that the tie will be decided on away goals.
Arsenal really should be beating Moncao, and I think they will do so quite easily.
Leverkusen have been patchy this season from my brief look into their results. Atletico have found some form at a good time, but are still lacking the consistency they had last season. Still, a fabulously dangerous team on their day, and they have been brilliant at raising their levels for the big games. So I see them going through comfortably.