125-200cc wr 125 pipe options

I have (just got) a 2000 wr 125, with a pro circuit pipe, and a stock pipe. It has the pc pipe on it and the guy I got it from said it supposedly made a huge difference. Any oppinions on the best pipe between the two? or the best pipe of all. I`ve heard good things about doma, but nobody can find them. I found doma and h.g.s. at 24mx.com with 9 euro international shipping. Steep price, but if it`s good... Any opinions would be great! thanks

I had a pro circuit and cant say it was a huge difference - I didnt like the pro circuit muffler as it seemed to lose mid range - less smooth
try stock pipe as a comparison

we tried the pro circuit at sea level and were very disappointed .
no bottom end , no mid only peak , which doesnt work for us.
tried pro circuit front only with std silencer and slightly better but eventually went back to std .
still battling with bottom end power

The FMF fatty would give better results - try website
expensive though
The FMF muffler to use would depend on type of riding
Id like to try the Turbine core 2 or Q for stealth
Any reviews out there?

(If I were you Id play with other areas ie carby and motor)

Yeah, I took it on a pretty tight trail, third gear tops with lots of rocky rooty sandhills here in michigan, and I noticed a lack of the low end this bike is noted for (low, no mid, top). I just noticed it has an fmf silencer too. I do ride it on the road some, so the top end might be good, but I think I`ll try the stocker on the trail. Thanks for your opinions. You guys must have some pretty good riding down under ey?