Europe Road Trip

Thinking about doing this next summer with a few mates (4 of us), would like to do some sight seeing and get some decent night life too, bearing in mind we'll all be 21/22.

Has anyone done anything like this?

So far I'm thinking about the following places:

Paris
Zurich
San Bernardino Pass
Turin
Monaco
Milan
Brescia/Lake Garda
Venice
Stelvio Pass
Nuremburg
Amsterdam
Brussels

Route summary: http://maps.google.co.uk/maps?f=d&s....539469,12.502441&spn=11.585174,33.815918&z=6

Is there anywhere else that's worth a visit? Also, how long would you spread this out over? I'd guess that's about 2 weeks worth?