Segun especificaciones¿ cual es mejor?

Specifications1

Power output: 25 watts per channel into 8Ω (stereo)
Frequency response: 20Hz to 30kHz
Total harmonic distortion: 0.05%
Input sensitivity: 2.6mV (MM), 150mV (line)

Signal to noise ratio: 72dB (MM), 90dB (line)
Output: 250mV (line)

Specifications2

Power output: 60 watts per channel into 8Ω (stereo)
Frequency response: 10Hz to 60kHz
Total harmonic distortion: 0.06%
Input sensitivity: 2.5mV (MM), 200mV (line)
Damping factor: 42
Signal to noise ratio: 70dB (MM), 97dB (line)
Output: 200mV (line)

Specifications3

Power output: 55 watts per channel into 8Ω (stereo)
Frequency response: 10Hz to 100kHz
Total harmonic distortion: 0.08%
Input sensitivity: 2.5mV (MM), 150mV (line)
Damping factor: 60
Signal to noise ratio: 70dB (MM), 100dB (line)
Output: 150mV (line)

Quizás el tercero, pero los datos de potencia no especifica "el tipo de medida"....