I'd just splurge on the regulators and purchase the very best that you can afford.
Let that be your primary concern -- everything else in diving, from head to toe, is just window dressing and subject to personal taste as much, if not more, than supposed necessity -- and there is little to nothing that I have not replaced in terms of the types of wetsuits, drysuits, and BCs over four-plus decades in the water.
My regulators, however, even those from when I first began, are still regularly put to use (often as ponies and on stage bottles nowadays) -- because they can still be serviced to this day; were and are dependable; were not absolute crap and subject, as so many things are in the dive industry, to the annual reinvention of the wheel and planned obsolescence . . .