I'm looking at buying an '01 YZF 426, extremely well kept, low hrs, etc. It comes with a full Yoshimura exhaust system plus the stock header/exhaust and FMF powercore4. The guy will take $3200 with the Yosh system or $3000 without the Yosh (I'm in So Cal so prices are higher here). Heres my question: Is the Yosh worth the extra $200?? Or would I be perfectly happy with the stock header/ FMF combo?