@Andrew Boon
Litespeed is great and costs cheaper than to change server for a bigger one and has better results,
so maybe you pay for it from 30-90$ per month but the difference of trafic you are using, the server capacity and speed that is increasing,
and and and cost much more at the end.
So litespeed is cheaper than apache even if apache is free.
Ps:there is the free version too.

Nginx is good for other kind of content but with big security holes