I would agree with you if you just listen to Classical music. But I think with HT and Heavy rock music you are completely incorrect.To me, having the extra power is day and night. A strained receiver will sound distorted.

M80's VP150 QS8's Earthquake SuperNova MKV-15
Integra DTR-7.4 Outlaw 755 Outlaw M200's Outlaw ICBM