The 6560 amplifier chip is obsolete, and has been replaced by the TB6600,
There are newer models of this single board system with the TB6600 driver, that incorporate a huge heatsink that is the entire bottom of the board. It also has more efficient 5v, and 12v voltage regulators built in for spindle control, 0-10v output with a separate spindle P.S.
Also, it has reduced the number of components, and is USB connected to the computer. For a small system, keeping power output under 4amps, @36v, it is a nice package. However, it you intend to push the amps hard with bigger motors, building a system with separate amps would be advisable, as pointed out.
The single board unit will result in a small system, with a minimum of wires. I have built both kinds of systems.
John