Usually, NAD integrateds tend to be more reliable than their NAD CD player brothers (no moving mechanism involved).
I have owned a NAD 352 for 5 years without any problem. I gave it to my brother last year when I moved out and he still uses it every day, hooking to his Totem Rainmakers & REL Q201E.
I currently own a NAD 326BEE for about 8 months. I have no problem whatsoever so far with the NAD 326BEE.
The thing with NAD integrateds is that if they break down; they will break down within the 1st year of ownership. After that they hardly have any problems.
I do like CA too. CA amps & CD players are also very nice budget electronics like NAD. However, I do not know anything about CA products'reliability.
I am a big fan of Dynaudio so I prefer NAD. They have good chemistry with NAD.
Marantz PM 5003 got a good review by Bob Reina at Stereophile. I have seen one listed here on A'gon for $375. Check it out.