Like blind elk said, try swapping your ignitor with a friends, Rok.
Still, you can't rule out the coils like you say. I found that the standard coils are actually pretty tough - mine were scorched, melted, and hammered - they weren't performing their best, so I taped them em up for a temporary fix, and they performed a lot better - got rid of some slight misfiring through rev range.
I bought a brand new set of superspark coils, installed, and found that they really don't perform a hell of a lot better (as they claim), than the standard ones taped up...
I reckon rule out the ignitor before you spend $ on coils