Choosing the ideal amplifier

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Choosing the ideal amplifier for 6ohm speakers

Hello all DIY fans,
I am planning on buying a new pair of speakers(Q acoustics 2050) with the following specs

Frequency Response: 44Hz - 22kHz
Nominal Impedance: 6Ω
Minimum Impedance: 4Ω
Sensitivity: 92dB
Recommended Power: 25 - 150w
Crossover Frequency: 2.6kHz

and I am searching for the best amp to drive them. Untill now I am considering the two following options:

  1. Helder's HiFi STA508 Monoblock AmplifierX2
  2. Ljm L15d IRS2092 IRFI4019H

This will be my first project and I am kind of scared of the outcome. My budget is $150. What do you suggest?
 
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