I second using Aurifil 50wt 2-ply in both top and bobbin. I have tried using Aurifil on top and polyester bobbin thread in the bobbin; however, for me this produced a slight puckering in the seams and my seams did not look as nice and flat. So, I went back to Aurifil top and bottom.
The "polyester thread eating through cotton" may have been true decades ago, when polyester was made differently. Modern polyester threads break as easily as cotton threads, so that is not true of threads purchased today. I don't think it was entirely a myth, just that it no longer applies.