Coats and Clark's quilting thread? I believe that is made to be used in domestic sewing machines. Thread made for longarms needs to be stronger because they sew at higher speeds.
I tried King Tut and Signature first, and both worked pretty well -- just a little threading and occasional breaking. Then I tried Glide thread -- never any shredding or breaking. Glide is all I've used since then! Here is a link to Glide thread:
http://www.bobbincentral.com/ . If you search, there were some recent threads (no pun intended!
) about Glide on the QB.
Here is a link to the Jamie Wallen video on setting thread tension. This video has helped a lot of quilters (including me!) get tension set right:
http://www.youtube.com/watch?v=Q1mRhcquZTM
It is going to be difficult to develop your quilting skills if you are using thread that breaks often.