I've had the Vibes before and I thought they were great for the price ($20 shipped on eBay). I really like a good, strong bass. However, the construction quality of Vibes is terrible; they break very easily. Therefore, I am looking for something of equal sound with better construction and reliability.
If the Turbine's are not any better in quality than Vibes I think I'll take my chances and buy another set.
Not a big fan of the s4's. I'm pretty determined to get either Turbines or Vibes.
Thank you for your feedback!