I'd recommend FastStats @
http://www.mach5.com/products/analyzer/. Webtrends is bloatware and slow. Of all the software I benchmarked along with my program FastStats came closest perfomance wise, and it is reasonably priced. Not recommending my software only because it only runs on server side right now.
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Fast and comprehensive analysis of your web site traffic
Statomatic - <a href=http://www.statomatic.com>http://www.statomatic.com</a>