The Mazda 3 MPS is made to make money in the competitive hot hatch market sector. And for what it is, I like it. No point comparing it to past cars or other cars in different markets in that price range because it is irrelevant in a money making sense. Mazda have a great product to take to the Golf GTi, HSV VXR and Ford XR5T (etc) and is my pick of those.
On the other hand, if I had $40k to spend on a car, I wouldn't buy a Mazda3 MPS. I honestly don't know what I would buy having just sold a second hand car for that much. Maybe an EVO? Maybe a modified GTR? Maybe (another) Monaro? Maybe a Typhoon? But probably a S8 Spirit R, RZ or S6 SP (1st choice) RX7 though.