A remap will wake the S3 up but at the end of the day you may find you just have a faster boring car. When I had my 7.5 R I found it super boring, everyone said to remap it and you'll love it. I went in a stage 2 R and just didn't feel it, still didn't really do anything for me so I've gone Edition 30 and wouldn't entertain going back to a R or S3. I'm not interesting in 0-60 times, the roads I drive on is more about 40mph upwards. In that respect my Ed30 at 302 bhp is a fair bit quicker than the R I had. There's a stretch of road near me and lamp post to lamp post I've run the Ed30 and R, the R would probably need to be 350 bhp to make the same speed at the second lamp post that the Ed30 does. As for CDL vs BYD isn't there only intake cam profile and intercooler that are different, the CDL having a slightly more aggressive intake cam and so makes a bit more torque when mapped. If I ever go 2+ I'd probably just have the intake cam from a CDL fitted the same time as doing the cam follower to roller conversion and an uprated intercooler would go in regardless.