So this is what I can see so far with BoB's:

PMDX:
Name - PMDX-424 Rev A
Link - http://www.pmdx.com/PMDX-424
Voltage - 5V
cost - >$238.00

SmoothStepper:
Name - Ethernet Smoothstepper Motion control board bundle
Link - https://emvioeng.com/shop/product/ess-bundle/
Voltage - 5V
Cost - £175

KFLOP:
Name - KFLOP
Link - http://dynomotion.com/KFLOP.html
Voltage - 5V
Cost - >$249

CSLabs CSM:
Name - CSMIO/IP-M 4-axis Ethernet Motion Controller (step/dir) with connectors
Link - http://www.cs-lab.eu/en/produkt-18,2...onnectors.html
Voltage - <30V
Cost - 229.00 EUR

Leafboy:
Name - Mach3 Usb Motion Card (AKZ250)
link - http://leafboy77.com/index.php/en/ho...on-card-akz250
Voltage - 5V
Cost - Cannot find


Please correct me if I'm wrong anywhere in that table. What I can easily see is that 5V is the commonly used voltage, and I think I'm right in saying that in order to use that I'd need to pull out both the board I have circled in blue AND the board circled in red? And then buy stepper drivers along with the BoB to replace it all?