First time to Europe, ticket questions

First time traveling to Europe and i'm going to a soccer game. Flying into Amsterdam, and at this point my choices are Ajax, PSV, Lille, Frankfurt or possibly one of the Belgian teams advancing in the Europa league, which we'll find out this week and very unlikely. Might be difficult to get to Ajax or Alkmaar or Frankfurt in the round of 16 game assuming they make it unless its a late game.
I do not want to go to a lower tier game. I wish i was going a day earlier and could go to Dortmund, but i'm not getting there until sunday march 15th.
The most ideal game travel wise for me to go to would be Sparta Rotterdam vs Feyenoord, or Lille vs AS Monaco, but i really don't care to go to either of those. If i go to Ajax, which is late at night but the game i really want to go to, then i have to take the train early in the morning to get to where i'm going to for work in Belgium. It would suck sleep wise, but i really don't care about how tired i might be.


Can i trust buying from Viagogo or Stubhub? the team sites say do not buy from there, but i've seen plenty of reviews that said they bought on there and had no problems.
ALso, both, Viagogo and Stubhub show PSV playing on 3/15, but PSV's website and a few other sites show the game on 3/14. Makes me not want to trust buying tickets from Viagogo/Stubhub.

Any suggestions on buying tickets, things to expect attending games?