Well, just got them in. The new supertips are jelly-filled and even may have air bubble in each unit. It is a good idea for users with semi-large to medium sized ear canals. Mine are small, so it isn't that good. The Turbine Pro is vastly better than the Turbine in terms of make. The cable is more similar the Denon C751, but has more energy (not a great thing, but not bad). And the stress reliefs are much better, but not perfect. The plug is amazing; the array of accessories good and the whole package smacks of customer feedback. Monster obviously listened to complaints and took them to heart when creating the Turbine's little brother, the Pro.
Listening (5 minutes) reveals them to be similarly big-bottomed, but again, not in a nasty overpowering way. They remain cleanly tubby and nice for vocal. Review coming ~3 weeks.
The Turbine (original) came right at a time when good options were coming to market. They also sold for 100$ more often than the 180$ MSRP. Now, with much more competition, the Pro have to fight harder. The comment above wouldn't be written probably if the person had seen and used the Pro.
In no way are they comparable to anything ~75$ - both in sound, and in quality of build/accessories. Nothing on the market at that price range sounds as balanced (in terms of clarity whilst carrying a great house signature).
They are built well enough to at least warrant a 180$ pricetag. For 250$, they may be stretching it, but I will make sure. Since the market has so many good earphones now, 250$ really has to be a top-level earphone. On the same level, however, they impress me much more than the IE8. There is no sadly soft echo, no prissy plastic. These are made very well, but still not perfect.