I think Inter has got a better team than Feyenoord, but I also think Feyenoord will reach the finals. Yhey have a good chance. Feyenoord has done it well against Italian teams the last years. (2x Lazio Roma, also one match against Juventus: 2-0) Feyenoord now even has got a better team then a few years ago. Only the defense isn't better
I would liked to draw against AC Milan (Inter is more difficult, see the result of AC Milan against Roda JC!), but Inter is the second choice. Borrussia Dortmund is more difficult for Feyenoord, however Feyenoord won against Borrussia in the Champions League last time they met.
It will be difficult but Feyenoord has the power to score when it they need it, like Van Hooijdonk did against SC Freiburg, Glasgow Rangers, PSV
For Feyenoord will play: (i think)
Zoetebier
Emerton, van Wonderen, Paauwe, Rzasa
Kalou, Bosvelt, Ono, van Persie
Tomasson, van Hooijdonk
If Feyenoord plays well, it is possible. So don't underestimate Feyenoord