I think that if you have the stock setup, they would be fine. From all the back and forth I have been through with various remap services in Japan, they are all willing to do mail-order remaps for stock-ish cars, but as soon as you mention turbo/injectors/pump/intake they need to remap the ecu with the car
Remaps from Japan are great if they remove the speed limiter and the ECU restriction on the throttle - then we couple it with a GOOD piggyback and a dyno tune.
... and yes, I will be going the F-con route - but you'll have to be patient
On a somewhat related topic, anyone seen a cheap Fcon V Pro (v3.24)?