125g per person if you only eat that, 80 to 100 if you eat something else too
Good brands you can usually find outside of italy with not outrageous prices are Rummo and Garofalo, less good but still okay, and at a generally lower price, you can usually find Voiello or De Cecco
Barilla is the most common, but outside of their spaghetti I'm not a big fan
There are a bunch of others, but these tend to be easier to find
That's all, thank you for coming to my TED talk