NO!!!!!!! Don't do it! Don't get the crucial 8500!
It uses 6ns ram. Look
here. It compares the crucial LE card with other retail 8500's (non LE). If you can find one of those for a good price, that's the way to go.
8500LE is supposed to run at 250 core and 250 memory.
But becareful!! Some are clocked lower, like crucial and some saphire. Make sure that the card you are buying is clocked at 250/250.
The other slower cards are still decent, but why get less?
Good luck!
EDIT: added link to clock speed