Typical injector flow-rate for a turbocharged application is either 440 cc/min RC or 450 cc/min DSM. Stock injectors are 240 cc/min.

The ECU operates on the assumption that you are running 240 cc/min injectors. Injector duty cycle is determined by RPM, TPS value, MAP sensor value and not much else. Basically if you swap the stockers out for the high flow ones without doing anything to compensate, you will run almost double the fuel you need at all times.

DSM injectors are cheap but noisy and you would do best to have them cleaned/flow balanced before installing them. Brand new RC injectors will be more expensive and you know they're good. Either will make your car run fine (with the turbo and some tuning), it's a matter of which one you want to run.

What do you mean by your stock injectors are "acting screwy"?