I recommend to choose ready to use solution with good support e.g. http://nginxhosting.com/
NginX support mod_rewrites, so it is not an issue.
I recommend to choose ready to use solution with good support e.g. http://nginxhosting.com/
Rather strange. Avactis should work fine with WordPress.
I think that something wrong with configuration of your production server.
BTW. What is MAMP?