How many of them are German?
Low-alpha bittering versus high-alpha bittering is one of the age-old debates, all I can say is that all the commercial brewers I respect, seem to think that low-alpha is the way to go for the styles where it matters. But then they're either British or continental European.
It's not because you're in the US, but because of vintage variation. 2022 was a terrible year for European hops, particularly for the quality of the traditional landraces that just couldn't cope with the heatwave. 2023 was a bit less bad, 2024 was back to "normal". So either you wait for the 2022/3 inventory to work its way through the system, or you reformulate and use different hops, as commercial brewers including allegedly Sam Adams have been forced to do.
Nah - if we're talking German lagers I'd stay away from anything high-alpha (ie double-figure-alpha) like Magnum. OTOH my eponym is more than just a good compromise - it's died out of commercial production here in the UK but is valued in Germany for the quality of the bittering it brings to lagers, particularly helles. So yeah, go Northern Brewer.
Not quite. The original warm-weather-Fuggly-thing-grown-in-what-is-now-Slovenia that was called Styrian Goldings, is now called Savinjski Golding. But then they bred a bunch of daughter-of-Savinjskis, including the triploid variety Celeia. But they would sell a blend of those varieties under the old name of Styrian Goldings - it's a bit like the UK selling "Goldings" that was actually a mix of Target, Challenger, First Gold and the original Goldings.
The EU took a dim view of that and so the name "Styrian Goldings" was deprecated as each variety had to be sold under its own name. The original "Styrian Goldings" was renamed to Savinjski Golding, but about 3x as much Celeia is grown (and even more Aurora), so that's more likely to be the Slovenian variety that you see.