Anything with the VAG TDI130 engine in is worth a look. So that's Golfs, Leons, Toledos, Boras, Passats as well.
Remaps to 170bhp IIRC.
Remapping on a turbo engine can work well.
Remapping an N/A engine is a waste of time, unless it is tuned quite well first (breathing sorted inc. exhaust, cams etc).
If you want more power on an N/A buy a bigger engine![]()