There's a board I'm preparing to connect with a audio I/O board, called the Papillio Pro - it's $85 with a Spartan-6 chip - it has limited I/O devices on the main board, but it designed to stack I/O boards on top, like the arduino platform does.

This is meaningless. The 65816 is capable of moving four bytes in the same amount of time the 68000 is capable of only moving two...

Additionally, the 68000 has 32-bit registers, but 32-bit operations require additional cycles. This is because it only has a 16-bit ALU inside.

WDC used to have an ...