I raced mine for two years. It didn't cost me anything in spares, bar one siezure (totally my fault for jetting wrongly).
I loved the novelty of it against the RGV's.
However, there are loads n loads of RGV's out there, so if you're serious, the RGV will be easier to source tuning bits for, and keep going if it does go pop. Or when I should say...
More chance of borrowing bits should you break it on the day too.
All this said, if you're serious about racing, buy a 400. Ouch! No need to tinker all the time, no fears of a siezure whilst cranked over giving it some.
And that's why I swapped to an NC...
_________________
MC21SP Plaything
BMW F800GS Bumblebee
Triumph 9551 Daytona Big boys toy
FJ1100 Sporting relic
GTS1000 oddball