Hey guys,
Check out gStats - its open source and works great !!!
Def better the Webalizer - has every report you can imagine...
Easy to install and just needs a line of code on each page (php site works best as you can just put the code in include/footer.php
Heres the url
http://www.g-m-m.com/
Been using myself for a couple of months and got to say - Its AWESOME...
Cheers !