I've always liked Urchin and Google are releasing a new version (currently in beta):
Urchin Software from Google
Michele was doing some tests with it recently and blogged about it. I got a little play with it too... really nice.
Michele Neylon :: Pensieri: Search Results
Other one I know of is
Unica's Web Analytics Solution - NetInsight and that was quite good.
I hate WebTrends. Never liked their stats program.
Hope those help.
Rgds,
Dave