Site to Reliabily Check your PageRank?

What sites can I go to that will allow me to reliably check my page rank w/o installing the damn Google Toolbar? I have run several of my mainstream sites through several ones I found with a general Google search of "Check Your PageRank", all are giving differing results. One told me that all my sites are PR10 (I wish, but I don't think thats the case) and several others have told me I have PR0 (I don't think thats the case, either) and most sites are giving me something in between.

I have found this site to be most believable.

http://www.prchecker.info/check_page_rank.php

Some results from this site: (Top one is mine)

Web Page URL: http://www.icwt.us
The Page Rank: 3/10

Web Page URL: http://www.gfy.com
The Page Rank: 4/10

Web Page URL: http://www.gofuckyourself.com
The Page Rank: 5/10

Web Page URL: http://www.sex.com
The Page Rank: 5/10

Web Page URL: http://www.wikipedia.com
The Page Rank: 8/10

Web Page URL: http://www.google.com
The Page Rank: 10/10 (Self important bastards!! )