Thanks! I ended moving the information to a Gist[0] for easier updating as I research more (hope to eventually settle for a few environments and actually try them). I'll check your links ASAP and add relevant info to the Gist.

Sporth reminds me a lot of https://forthsalon.appspot.com/ They'd make great partners :)

[0] https://gist.github.com/alvaro-cuesta/dc714c06a8e672bebd90