how much power

I once believed the"you can never have too much power" credo. With exposure to the high quality low watt amps I discovered superior sound and better music reproduction(more natural and real i.e. less hifi or canned).
As long as there`s sufficient power for a given speakerload, the simpler less complex amps usually out perform. YMMV.

Marakanetz,
I agree with your 2nd point ( I clearly said amp has to match the speaker load demand-requirements).
Your first point I simply disagree with based on direct listening encounters over the years. A low power amp if matched with appropriate speaker(load and efficiency) will provide full and relistic bass(I know I`m not the only either).
If your experiences have been different no big deal I understand, but I know what I`ve heard. We`ll just have to agree to disagree that`s all.
Best Regards,

Lacee,
Wonderful insight and true words of wisdom.Nothing beats real life experiences as examples.