My GTI is leased, so a custom remap is not an option. At least with a tuning box or hand held unit you can sell on when the car goes back. Or with the Racechip you can get it reprogrammed to your new car for £109
Decided to go for the Racechip RS for £229. Think 297bhp is enough for me and probably close to the limit that FWD can handle without the performance diff.
Will report back once it arrives and is fitted
If anyone is interested in the GTS box for £349 I can email you the link with discount code