Cost me £200 to take it from stock to 350bhp and 460Nm. Had the map on for over a year now. 100% worth it. Should have come out of the factory like this. You may have to do some other mods to allow the car to put the power down more efficiently though e.g. dogbone mount insert, better tyres (PS4s, or equivalent). Mine used to wheelhop like mad before those mods.
 
I used a local guy to me. The map was a Quantum map. Revo and APR also do maps. See which is best for you, and see who’s local to you.
 
I would suggest you think about what you are after and then decide on the best way forward.

If you are going for ultimate power then its not just about a map but there are many engine / manual gearbox parts you will need along with bigger brakes and possible suspension upgrades.

You also need to consider your insurance and in some non uk countries if you are allowed at all to make changes without certification (which is expensive)
 
Hi.
If you have any issues with insurance at all for a re-map then please feel free to drop me a line.
Regards,
Dan.