the MetraTop series come / inspired from the 28s 29s series, mostly from their same asic and the resolution at 310,000 counts
as for the price loll
My new 28s costed 30% less than the TOP 51, but costed a lot ... with an good import fee ... Euro to Cad outch outch outch
Gossen are a niche and very expensive, even the accessories as i wrote in the past are ridiculously expensive(s)
Metrix are not far away too
i would love to get my hand on a Gossen 30M ..... anyone loll