The only thing I have booked is 2 nights in Austria and 5 nights in prague, the rest of the 9 days are wide open. I thought about taking a side trip to Germany but I have been to Germany twice (never to Berlin though) but with the prices high there I sort of poo poo'd it. I am really thinking about Croatia.
We have alot of Engineerings/drafers/random works at one of the manufacturing facilities and they keep saying how Croatia is soo beeeeeuuuuuteeefull