Isn't European pricing for similar setup with a ScubaPro Mk19 Evo and a pair of G260 seconds also in this price range?
I'd expect a larger discount for the scubagaskets offering. I guess it depends on how much you value the stainless steel construction and no fuss availability of parts for DIY service versus the risks of dealing with a small company that's just getting started in the reg business. A good reg will last decades, not many reg companies have lasted that long.
Similar in Australia, I can get an mk19/mk25 or Halcyon at a similar price range, or a Hog D1/D3 for much cheaper for DIY (excluding a course cost). The SGS3T4 looks quite interesting, but it's starting price isn't quite as competitive as I'd hope for with a new company.
I might still get a first stage when they sell the individual components, or a full set if it's long hose configured.