Opinon: Don't bother with anything less than 268. Worst case set idle at ~770-800rpm, instead of std. LOW 700rpm. Going FI: Keep the 268. 1000% myth that a 'common' cam should not be used with boost.
Don't use ANY AFC or other piggyback. The Mk4 12v use ME7 ecu and has fulltime Wideband O2 control. ANY tweak you make with a piggyback or other ~add-on device will simply be trimmed out.