Blimey, £300 for a knife. That's some serious dedication to cutting. I'd get a sword made out of that if I were a ninja. Of course, if I were a ninja, I'd have killed you all by now for knowing my secret. You might not realise this has happened for a few minutes, until your head falls off and you'll be looking back up at your slowly timbering body.
I'd just remove my finger as I'd be the clumsiest ninja. I think I paid £20 for my top knife (I could have got cheaper, but I thought I give Sheffield some favouritism) and give it a quick swish with a sharpener, it seems to cut through everything with minimum effort. For serious slicing, I have a mandolin or I can feed the cat-scaring Magimix (Bad Cat hates it, me, I sometimes feed it things from the cupboard just because who doesn't need an entire grated block of cheese?).