The more important question is why do you want to change your bottom bracket. Unless it is malfunctioning...which seems unlikely for a 6 year old bottom bracket...you are probably going to be replacing like for like.

If you do have to replace it, that bottom bracket would work as long as you get the proper length. You'll have to pull the cranks and measure it to be sure.

Finally, you can do better on the price. A quick Google finds them for around $15. If you are going to pay full retail, you might as well get one at your local bike shop and help them keep the lights on.