I would choose #1 if I believed in the company (FAANG tends to be a sure bet in terms of growth). By the time RSUs vest they could be worth substantially more. This is assuming that you're awarded a set # of RSUs rather than a dollar amount pegged to the price of the stock at the time they vest. The details of vesting matter here.

If you're unsure or feel uncomfortable with the risk, then the all-cash option (#2) would be better.

As for option #3, it would really depend on the specific company - difficult to evaluate without knowing. It's hard to know if taking a bet on a non-FAANG company's stock is a good idea without an understanding of what space they're in, what stage they're at, etc.