Hi Guys, newbie here so go a bit easy

Just recently bought a MK5 GTi DSG, absolutely made up, great little car.
I plan on a Stage 1 tune fairly soon so I'm looking for a suitable brake upgrade.
I dont want any fiddling about (spacers etc) just something that will bolt straight on and fit behind the standard 18" Monza II alloys, also budget is limited

Are the S3, TTS, Golf R, R32 brakes all the same? and If I picked up a second hand kit would these fit without any mods?
If some kind sole could advise on a way forward I'd be very grateful

Many thanks
Bryn