of course google analitics. it's free for full options and google does not want a link to google web site
A perfect mix of both is the best way to go. when you want quick look at traffic... go to statcounter. and when you are free and wanna do some in depth analysis... go to google guys.
analytics is the best option, it gives all the data you require and is pretty much reliable also. but then, i also use the adsfreestats, that's my best alternative to analytics!
Well I use both service but I still like Statcounter servcies very accurate and real time updates. Google's stats and Statcounter's stats always different.
FWIW: sitemeter is rumored to be dropping some real annoying tracking cookies. See here: http://blog.statcounter.com/?p=4 and http://forum.abestweb.com/showthread.php?t=88601 Plus, statcounter just upped their free logs to 500.