Serious topic : Which nerf guns to buy ?

This is it guys, in the next few months 3 of my 4 daughters are going to be 4 4 and 6 y.o.

I feel ready for the big purchase, nerf guns with daddy.

Priorities are : 1. Safety, should I buy protective glasses ? 2. Are bullets strong enough to resist biting from the 14 months old toddler 3. Enough power to feel satisfactory but not hurt the kids 4. Are off-brand worth it ? For cost and sometimes there are good copycat brands in the toy industry 5. Something easy to reload for the 2 younger ones 6. Something more "adult" such as a rifle shape for daddy, but that still feels and look like a toy, I dont want to induce the "real guns" culture in my kids either, this is a game and it shall stay like that.

Give me your best models and recommendations gents, I trust in this sub's competence for such a serious matter.