Bro, i got a 00 GTS, and i have the Ultra Medallion for about a month now. it sounds awesome. looks very nice, since it is titanium with bluish pipe, giving you a nice 'burnt' looks.
it doesn't sound too loud when it is idling, however when the rpm hits about 2500, it will start roaring and it sounds like music to our ear right up till it hits the redline.
Go and get it, i'm sure it is worth getting it and you won't be disappointed. good luck...