for the big power, Germany Trumpf laser source is also a good choice,

1, its price is cheaper than IPG, but its functions and performance is around same as IPG Source.

2, it is made in Germany, so its performance is better than China max or Raycus.

3, Germany trumpf laser cutting machine is best in cutting copper and aluminum sheet. it is no problem at all .

now we have 2-8kw cnc fiber laser cutting machine for choice. and it is best in cutting with Germany Precitec head.