My Bernina just prefers the Aurifil, maybe it is what they are raised on at the factory :-D . There is an outlet that has clearance Aurifil, let me see if I can find it . . .
yes, here is my old post from Feb. 2009:
Tristan thread in Western Canada is clearing out of Aurifil. The price converts to less than $4. US for 1300 meter spool including shipping when buying larger quantities. At least it was when I purchased last year, but it looks like they still have some.
http://www.tristan.bc.ca/
Good Luck. Maribeth