My thread of choice is also Glide. A trilobal poly that just seems to look great on everything I use it for. I love it and their magnetic core prewound bobbins. I also have an Innova and it has been a champ with any thread I have thrown at it. I was not crazy about connecting threads LA thread. When that cone was gone I rejoiced. I still have a bunch of their cotton stuff that I use but again, when it is gone, I will not reorder it for LA. It is nice for machine applique though on my Bernina and hand sewing bindings. But it is very linty.
I have used numerous threads from Superior and they all perform well but some are fussy about tension settings so take advantage of Superior's sheets that give recommended tensions. Isocord polyester embroidery thread is very nice for LA quilting too. Before discovering Glide I used that quite a bit. YLI makes a very nice cotton LA thread.
All of my thread for LA quilting I get on line or at quilt shows.