I'd be great if you could post some tests for this chip-amp, since as far as I've done research there aren't many amplifiers that can keep up with the SymAsym. (But I'm open to suggestions, since our Kitchen could use a decent sound-system ;-) )
Actually chip amp's were frowned on until 47 lab's gaincard which is based on lm3875 gained rave reviews http://www.sakurasystems.com/reviews/reviews6.html
You may have come across this design http://dogbreath.de/GainCard/GainCard.html
. The gaincard only used a 1000uf power decoupling capacitor(!) and the length of the signal path is just a few centimetres, and the feedback resistor is mounted so close to the IC that the length of this path is less than 1cm!
A guy has benchmarked the circuits based on the gaincard (gainclones) here http://www.adx.co.nz/techinfo/audio/gainclone1.htm
and comments "The harmonic distortion that matters never exceeds 0.001%, which equates to a power level ten billion times lower than the fundamental (0.001%^2 = 1E-10). This is better than the performance of most CD players, including many high end models."
I use the LM4780 stereo 60watt amp whose THD at 2x30w from 20Hz - 20kHz is only 0.03% THD. http://www.national.com/mpf/LM/LM4780.html
There is no doubt that the symAsym is a excellent transistor amp with impressive statistics and if you are into transitorised amps then thats the way to go.
The reason i like chipamps is that they are so convienent to build, have excellent power supply ripple rejection ratios, and have so many safety measures like safe operating area and over-voltage, under-voltage, overloads, shorts to the supplies or GND, thermal runaway, and there THD is so low that it rivals that of transistor designs.
If you havent tried the national secmiconductor Overture series of chip amps, then i would strongly recommend you try it...they are fun and the audiophille in you wont be disappointed
Here is a link on how one guy created a clone of the original, http://dogbreath.de/Chipamps/GainCardCopy/GainCardCopy.html