Paris, Amsterdam, ?
I just booked a flight to/from Paris, France. We'll be there between July 4th and July 16th. We're flying out from Paris on the 17th in the morning. I'd like to spend 4-5 days in Amsterdam and 3-4 days in Paris at the end of the trip. My girlfriend would like to see as many countries as possible (Netherlands, Germany, Switzerland, France) whereas I would like to see more within France and the Netherlands. Asides from Amsterdam and Paris, I don't know where else is worth visiting.
Our plan is to rent places with AirBNB, but before I can book the places I need to figure out where we should be going and what's the best way to get around? It seems to me like the eurail is a fortune and that we'd be better off renting a car. It's about $550 to rent a car for 13 days plus gas. From what I can see, a single trip on the Thalys from Paris to Amsterdam is 300 euros one way for the both of us.
In desperate need of advice!