What is the smartest online chess computer that would have the highest rating?

i want to play chess against a computer on super duper duper hard modeWhat is the smartest online chess computer that would have the highest rating?
Rybka 3 deep sometimes are on icc!

By the way rybka when playing blitz can make all the perfect moves, and during standard it also moves very fast, sometimes it may think but doesn't take that long to think and plays better than all chess computers, Rybka 3 deep highest rated chess computer. I will get mine in feb, Rybka 3 deep, but that can cost up to 100 dollars!What is the smartest online chess computer that would have the highest rating?
You do realized that the higher the computer level, the longer it takes to think; meaning some moves could take half an hour.What is the smartest online chess computer that would have the highest rating?
Right now Rybka is pretty much the highest rated computer program in the world. You can get Fritz for much cheaper however and is so strong it will completely rip you a new one while cracking jokes on you at the same time. There are very few people in the world who can beat Fritz, never mind any other program that strong.