Owning a 52 plate JDM spec WRX Sti (sold my Lex 2 weeks ago ) as the guys say speak to the lads with the turbo kits, my Scoob is running a tad over 300bhp , and to get that kinda power you will be spending BIG BUCKS.
I think that 240 is good with the turbo on standard internals , over that mark then its uprated everyting, if you want scooby just power buy one :)