Considering ATMega325P but running into trouble

We are short 1 pin on the ATMega324P so we've been considering the 325P instead which has a lot more pins on it. Unfortunately, this morning I just discovered that the 325P seems to be light on features that the 324P had such as multiple USARTs and multiple external interrupts. So now I'm stuck. Maybe we can consider the surface mount version of the 324P which probably has a few more pins on it.