Just because you have 145 watts doesnt mean you have to use all of it. Gain and head unit settings controls how much power the speakers sees.
An amp barely lifting a finger will keep cooler, last longer and provide cleaner power to your speakers which yields much sound quality. Overhead with common sense is always the goal for best longevity and performance.
Vs a weak amp working 120% of the times stressing out heating up and providing dirty power with high distortion from Being overdriven.