Doing 15-17k a year should be a big decision maker in the route you go.
I do 12-15k a year and investigated all the options last year. My conclusions was that whilst the REVO SP3 would be easiest due to plug &plug, it would still be better to a get a custom map that was specific for my car due to the stresses and types of journey I do.
I looked at REVO map installer/tuners, but all the numbers and suggestions were pretty similar and none seemed bothered about milage only 'max power'. DMS however were different and was my final decision, so if I still have the car when it falls out of warranty next year i'll be taking it there. They said they could do 320hp and 480nm, but they suggested 300hp and 450nm with a progressive (less 'spike', in my layman's terms) power banding for the remap so I would see good benefits but also remain in decent tolerances for my milage/use. They will also modify the DSG shift speed, paddle reaction speed, line pressure (clamp). They also map target RPM on downshifts for rev-matching etc
HTH