site statistics alternatives

Hi folks
I have been useing statcounter for a lot of time and don't plan to move away, I love them
but I have a website that is breaking the 250.000 pageviews a month limit so I'll probably be asked to upgrade/move away that site
the fact is that site is not making cash, it's a proxy, so I'd like to know if you know another free and invisible tracker as good as statcounter or at least similar
I would use AW stats but the statistcs suck and the numbers aren't either near those given by statcounter
I have never used webalizer.....is it worth switching?