Thanks very much for your quick answer!
The Enermax Liberty 400W is ? 25 (~USD 30) more than the be quiet! PSU.
Comparing the Amps:
be quiet!: +3,3V: 30A, +5V: 28A, +12V1: 14A, +12V2: 16A, -12V: 0,5A, +5VSB: 2,5A
Enermax: +3,3V: 26A, +5V: 26A, +12V1: 20A, +12V2: 20A, -12V: 0,6A, +5VSB...