I'm going to be launching a website fairly soon with a full

I'm going to be launching a website fairly soon with a full woo commerce integration and eventually buddypress as well. We already have 50k visitors every month and when the store launches with the new store we expect to have even more.

I'm getting really nervous when it comes to hosting. We used to be on dreamhost before but they were horrendous for a number of reasons. Right now I'm on wpengine, but I started hearing about NGINX. Can someone help me compare the two?

Thanks,

Faraz