Just, another idea. Sorry, if I'm confusing. You could offer option to select more storage on micro SD card for the Syncloud R (and C) as main storage (128,256,512) as they are getting cheaper...
I do not think we should grow RPi options as it is coming very close to Syncloud H(Odroid HC1) price where you can have much better SSD disk with space options as you mentioned.
Just, another idea. Sorry, if I'm confusing. You could offer option to select more storage on micro SD card for the Syncloud R (and C) as main storage (128,256,512) as they are getting cheaper...