I used the A23 and thought it a class unit (way above average sound as well).
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Hello friends, i also have been fortunate enough to having owned and enjoyed the mighty Halo P3 and A23 Parasound combo and they have been rock solid reliable and incredibly sounding units connected in balance configuration. Upon listening to my units a friend bought a pair as well and both mine and hers have function perfectly. That was more than 4 years ago.
Good luck in your search amigo.