2) Working on a product you don't believe in will suck
3) You don't get rich with a big salary. You get rich with startup equity (and other assets that appreciate over time such as real estate). However, you probably know that startup equity involves risk. A big salary, however, can give you the possibility of doing angel investing (start by backing AngelList syndicates).
4) If you are seriously considering ever starting another startup again (even in the long future), you will have a hard time getting used to the startup life after getting out of the BigCo. Sam Altman elaborated on this on his latest post, arguing that YC founders that came from senior roles at Google and Facebook had a really hard time.
Assuming that you would also learn valuable technical skills at the BigCo, I think it all reduces to this question: Do you want to take the high risk of becoming rich via startup equity, or not?