whats a better pipe for the suzuki ltr450?

[miami_rider#13]

i heard the dasa's are a really good pipe for this bike
and i've been hearing the same thing for the yoshi's too
and the big guns sound reallly nice so i dont know which one to buy.

I want a pipe that'll give me performance with an amazing sound.

and one that'll do me good at the track because i am a sx racer.

soo guys give me what you think so i can figure out which ones bettter.