1) If your bike is working properly, nothing added is WORTH the money, but if you WANT it, go for it.

2) What you notice depends on how gullable your mind is.

3) Similar to the above, the Forte Titans are pretty much the same and cost less. I hope you're light, though, as low spoke counts on cheap wheels mean limited durability. If you want durable, I suggest something like Open Pros laced to Ultegra hubs.