What is your favorite chess program for game analysis?  I'm looking for something with a "user-friendly" interface to analyze my games.  The program engine needs to be good, but it doesn't need to be top-notch (since I'm more or less a ~1500 USCF rated player).

Please posts yourn favorites and why.  Would really appreciate any and all insight, thanks!

fritz is allright for the wealthy/creative people, or if you just want to get something quick for free you could go for http://www.playwitharena.de/download/arena_201_setup.exe