I would go with SO3. @Edward_Ford has been doing great work with the platform and if I had your money I would buy a SO3 and come up with projects to cannibalize the SO1. (Like build a small CNC lathe).
If you had a SO2 I’d say upgrade until you go into debt. The 1 is so outdated now that cost of upgrades is the same as a better machine. Good luck and keep us posted with what you decide.
Thanks Neal, I’m kinda leaning that way too… But… Edward appears to be going “private” with SO3, I really appreciated the open source nature of SO1 and SO2.
Matt, I think he’s still keeping it fully open. At the bottom of the Shapeoko site it mentions Attribution-NonCommercial-ShareAlike 3.0 Unported license. It doesn’t, however, make mention of the controller board being open.