I think every machine has it's own personality. Two machine, same brand and model, might 'like' different threads. I use many different brands depending on what my project is, but my 'go-to' thread is Presencia 60/3. It's a great piecing thread. It's strong, isn't linty and long lasting because it's 60/3. I buy cones from Ebay, it's a better deal that way.
Micha