When you want to research the competition at your table, or see how you stack up - which site do you use, and why?
 

Some of my favorites for tournaments and SNGs:
 

http://www.sharkscope.com/
 

http://www.officialpokerrankings.com/
 

http://www.pokerprolabs.com/

 

And for Cash games:
 

http://www.pokertableratings.com/