So the machine had 1Kw servo motors on and a 300W servo motor will give you plenty enough power? Without getting more info on the machine it would be wrong to say that....
Even i am assuming that the motors are 1Kw, so i am unable to suggest the right motors without making an assumption.

If the motors are rated at 3000 RPM, they are 1Kw motors, that would give you about 3Kw of peak power. that is over three times what you suggested.
Going to steppers would be a big step backwards, even running them at 230V. While its a big step back, it will still work, but dont even think it will be close to what it was with the servo motors on.
Oh and the price of the 2M2280N has not gone up in price in 3 years. VAT is shown in the price at the moment, so an easy mistake to make.