Utrecht ROCKS!
But well Twente is cool to, Leiden is more for Language freaks and Egyptologie people, and Delft is a good choice if you really want to do Informatica... I first thought about Informatica too, but it's just ONLY computers all the day... So now I'm doing CAI (or CKI in dutch, Cognitieve Kunstmatige Intelligentie) and that a bit Informatica and a bit Psychologie, Philosofie etc. By the way if you are going to study in Utrecht you should meet me