Brake pads Brembo or Hella Pagid

I use Pagid RSL29s on my M3, I don't bother switching pads after events. They work great on the street but I'm in Texas so it rarely gets below 45 degrees here. They squeal but the dust isn't too bad. I don't daily it but I wouldn't have an issue if I did. The squeal is annoying but really not too bothersome to me even though I drive 95% of the time with my windows down.

Couldn't answer your first two questions, but the last question about Brembo being reliable is a very solid "yes".

Brembo directly supply Mercedes with their brakes.

The camaro SS uses brembo pads which are really good hence the price tag (imo the quote you got is pretty reasonable). If you want a more cost effective alternative, hit up MSW autoparts and ask for Zlatko. They have EBC brake pads which are also really good aftermarket pads.

Brembo make some fantastic road-orientated sintered pads, they improved my Street Twin loads.

Running coated rockauto rotors (rust belt life) and brembo ceramic pads. Stops well for under 250 for all 4.

Brembo Z04 is very expensive but is the strongest pad you can buy

Vesrah RJL-ZZ is cheaper and can offer decent bite and is fairly linear pad, XX is stronger but also more progressive

EBC GPFAX is a good pad and cheaper, kind of similar to the ZZ but slightly less feel and weaker

Had my Giulietta's Brembo 330s fronts done (pads and discs) for about $350 with labour and taxes

You'll need decent pads, and ones that can handle a car with a bit of weight behind it, think Pagid RSL29, Winmax W5 or Mintex 1166 if you're not going mad. You'll want to flush out your brake fluid and replace it with something that will take the heat as the tiny brakes on a 325i WILL overheat, its not a matter of if, its a matter of when, good fluid will stop you from boiling it and crashing!

I got pagid and they are decent.

For breaks, I will actually advise against the OEM stuff, because it’s really not that great, especially if you have the Brembo package. There are significantly better pads out there, the Brembo ones are hot garbage.