Awstats is great and already on most Apache servers especially if they use cPanel. I like to use it coupled with a client side program such as Google Analytics or Hitslink. Google Analytics provides all the necessary info, but it's a bit clunky to use, in my opinion, but it's free so that is a benefit. If you have the budget to upgrade to Hitslink (small monthly fee), I recommend it. (It has a 30-day free trial so you could compare side-by-side for no cost). It has better custom reports and can export to PDF, CSV, or whatever, and they can be automatically emailed to you. Here are the links for
Google Analytics and
Hitslink.