As far a I am concerned the W40 has made the W3 and Pro30/UM3X obsolete. Its that same upper mid tier level IEM but fixes faults of both.
I have not heard the W30 but I would advise people if you can afford the extra $100 DO NOT but the Pro30. The W40 fixes it faults. Its a great product!
Thanks, I can afford the W40 so I am better off with that than the Pro30?