Theres no such thing as a cheap power fc.there always gonna be making mad money
theres one on imoc at the moment for £600 and its for a rev 3 +
will obviously need to be mapped when you put it on your car as he has it mapped for a different turbo and injectors etc but i take it you'd be getting it mapped anyway
i saw in your other thread your already running a mines ecu chances are if your car came in from japan with all the mods and that ecu then its been correctly set up by a tuner in japan and a power fc might only squeeze a small bit of power out of it with a new map
if your planning on adding some more mods to up the power then a power fc would be needed alright as the mines ecu's are generally locked and need to be hacked im sure and no-one here really knows much about them.
does your car have an upgraded intercooler aswell?