I only machine piece and machine quilt. I use the same thread top and bottom when piecing. Sometimes I use the same top and bottom and sometimes different when quilting. I use Mettler Silk Finish, Aurifil, Precensia and King Tut. I recently added some new threads from Wonderfil and one other brand but I haven't tried them yet.
I do hand finish the binding and I use Mettler for that.
Basically I use quality fabrics and I use quality threads on those fabrics. I do not use polyester threads.