I don't think there's a developer edition of the 9570 model (there's no linux driver for the fingerprint scanner for example), and in any case we rarely get the Dell developer editions here in Australia.

I am certainly saying that a fresh install of Ubuntu (and a reasonable attempt to get over the initial issues eg. using a respin available on github) has too many problems for me to either live with or spend time investigating. Others may have more tolerance for fiddling around with OSs, but I've done my dash with that kind of stuff.