As a straight answer, Quality every time. Quantity is often done with too many shortcomings - because, it is harder to get everything as good as it needs to be in the amplifier for that extra power to be, subjectively, fully beneficial. IME a low powered amplifier, properly sorted, driving normal sensitivity speakers is perfectly adequate for creating an intense emotional experience in the listening; in fact, with recent compressed recordings the average volume at the higher end of the gain scale is just too much, you will want to turn it down.
I haven't found clipping to be a problem - if the amplifier is good quality it will not exaggerate the clipping transient, it will not be audible. Far worse is the fact that power supplies in many amplifiers collapse or degrade badly when asked to deliver higher average power, and this causes severe audible issues - a low powered amplifier with a very robust power supply will win every time, subjectively ...