My group of friends is seriously considering dropping 3.5 permanently. (I rather not but I like my group so I go with them, i can always play with someone else). They read some of the classes in the Pathfinder Core Book at a recent Convention we all attended and were like "Why have we been playing 3.5 all this time??" What books would you guys recommend a new player and even a new GM buy to start other than the Core Book? How much has really changed from 3.5 other than the classes?