Personally I would go for APR if just going Stage 1 after the issues with my REVO Stage 1. If you plan to go to Stage 2, then REVO is fine, my car is anyways! Going for a Milltek Cat Back aint going to do much preformance wise, just look good and add a bit of grunt, to go stage 2 you will need a new downpipe and sports cat so i would be more inclined in going for that first.