Here's a backlash! I've used primarily Dual Duty, a cotton covered poly thread for most of the last 40 years. I've heard all along about "oh that's bad, you must use cotton!" No, you don't need to. In fact, I can show you my first quilts that show that no, the evil polyester did not saw through my fabric. I can show you my collection of wooden spools, on most of which the cotton is rotten and can no longer be used. If it can rot on the spool folks, it can rot in your seams.
I started using the Superior prewound bobbins for quilting on a long arm and loved them for several reasons. For one, we couldn't wind a decent bobbin on the Pfaff to save our lives. I love the extra amount of length in the thinner threads/prewound spools. I have used pretty much all possible combinations of various threads (Dual Duty, King Tut, Coats Machine Quilting, etc. etc.) with Bottom Line and always had good results but I always do a test sample first and adjust what needs to be adjusted.
I am currently using Bottom Line (I bought the huge cone of white), and will be trying my top quilting with this too with a pair of preemie donations quilts I have to quilt down. I no longer have access to the long arm I was using, but I was given a modern Bernina 820 with the warning that it was a bit fussy with threads but it liked Aurifil. I like Aurifil too and we are doing just fine.