edible chaeck your prices more often, the maximum you will pay for a Hacker C50 is £245 now. One thing though, the axi's have a longer spool up and spool down, having the magnets spinning that far out means more energy is needed to spin the prop up. With a C50 you'll get a harsher more rapid accerlation being an inrunner and gearboxed. Also with the dampening properties of the wooden fuse the noise difference won't be that great anyway.