At first glance it seeems a bit sickening that we have got a difficult route and the Mancs have got it easy. However, you do not have to look back very far through this competition to see that things do not pan out the way most people expect them to.
You can cite Benfica as a team we thought we would beat and didn't whilst we have been written off by most neutrals in games against Chelsea, Barcelona, Juventus, Inter Milan, AC Milan, Real Madrid (getting dewy-eyed just thinking about these). Also, look at Porto against Man Utd in 2004, or PSV's displays the year after, or Leverkusen in 2001.
We can worry about the Mancs if we get them in the final, but until then they are not worth bothering with. And while you have to respect the teams that block the way to number 6, we should not fear anyone.
After all...we are the number 1 side in Europe