I havnt heared of any member in this board with the OneAndOnly system. In regard to the kressiege, It is built of high quality materials, and the plus about this system is you get to have 2 different sound levels with a flip of a switch. However, the price is really expensive i am not sure if its worth it or not. Try contacting member Ryan@Eisenhaus ( He is a sponsor and can help you) Very nice guy and I personaly have bought the NEEZ wheels and would recomend him.
Again if you dont want to invest that much on an exhaust system, since you still have to ship the product to your country. I would go with Tubistyle, very nice tone and you get to save weight as well.
Here is a link to my setup:
http://www.youtube.com/watch?v=2ii9ZnyzR6A
-Its mufflers only and it is the loud version of tubi exhausts called "Rumore"
I think there is a member in this board with the Tubi Setup + Eisenmann X-pipes who lives in the phillipines. Try contacting him you might be able to get a chance to hear it in person. However, he has the quiter version of the Tubistyle exhaust.
Hope I helped.
Regards,