TBH you don't need as much power as the S3 lump
AGU or AUM is fine
Or the Auq with its 180 bhp, (same engine as above basically but with a different standard map - once mapped they are all about the same)
AGU only has K03 so upgrade that tp the K03s and remap it and you will have over 200bhp and believe me it will fly and you will smile all day
So yea any of the above codes are good and readily available and don't brake the ££££££ like the S3 lumps do..
Its not about the BHP, its all about the torque