I tend to agree with Pubu57 in that it may be system dependent and you need to try for yourself.
I recently changed from a Mac MC402/C46 combo to a Luxman L590a II integrated, 30 watts Class A, and very much prefer it to the Mac combo, with my speakers. My speakers are relatively easy to drive, the Luxman drives them effortlessly, it seems much more powerful than the 30 watt rating; also, the bass is better with the Luxman.
I recently changed from a Mac MC402/C46 combo to a Luxman L590a II integrated, 30 watts Class A, and very much prefer it to the Mac combo, with my speakers. My speakers are relatively easy to drive, the Luxman drives them effortlessly, it seems much more powerful than the 30 watt rating; also, the bass is better with the Luxman.