They make the XPS 13" in a developer edition, but literally Dell do not make an XPS 15" developer edition model. I prefer a slightly bigger screen when working while travelling (in fact I would probably go for a 17" if it only cost an extra 0.5kg).
You can get the Precision 15" with Linux. However I was quoted a price 2 times as much as the XPS 15 with a lower spec, less community support, and I was quoted it with 16.04 installed in Jan 2019 (presumably only 16.04 officially supported? Hard to get information when we are only a small business).
