If your after aftermarket management the best advice for you is to find a good well known tuner that work on and know fords that is within reasonable distance from you and speak to them. Every tuner is different and have there own management they like to use, speak to them and tell you what ypur plans are. Prices very massively according to what you want your management to do and what your future plans are with the car. My kms management from devil developments started off at £1250 (a few years ago now) supplied and fitted and on top of that i had to have bigger injectors, fuel pump, map sensor and full lambda control think that took it to around £1800 and that was for an entry level kms ecu. Im kicking myself now that I didnt go for a higher spec ecu as when I had it fitted it was to a basic 200bhp rs turbo now ditched that and gone for a 400bhp zt so make sure you have a goal and stick to it otherwise youll be spending ££££ lol