I have been thinking about trying the Superior brand (King Tut and Bottom Line) because of all the rave reviews on here so I have been "shopping" to try to find the best price. Here's what I found so far...
kenquilt.com has King Tut for $18.50/2000 yd. cone and Bottom Line for $10.00/3000 yd. This has been the best price I've come across.