Had the belts, plugs, pulleys done today (thanks Julian).
Interestingly the oem crank pulley was starting to separate at the elastomer so it was lucky that I had Raptors lightened version to replace it with.
My thoughts re the pulley are that it is no replacement for the Sprintbooster as it obviously doesn't change the dbw throttle pedal response, however once you are into the powerband (3000rpm+) the engine spins up quicker & feels more responsive, so definitely a worthwhile mod imo.
I didn't notice any more nvh with the pulley fitted either but my car has all the vibratech & powerflex mounts fitted so is fairly harsh already.
Im just glad I caught the oem pulley before it came apart.
Oh & my belt doesn't squeal at all.