The detatched power supply unit is heavy.  I figure that with 14 days to return it if it doesn't do it for me I may as well.  It as only $160!
Without warmup and crappy cables connecting to the NADC350, bass does seem to have a tad more authority anyway..could it be 70 vs 60 watts?  The nad bass was a little hollow.  Imaging is better, but there's less depth.  Of course, this is after it was sitting on the shelf in a store for a longish time.  
The power supply box does vibrate slightly and there's a slightly audible hum.  I wonder if that can be dealt with.  If it was in the actual amp case, I'd return it.  How normal is that, anyway?  My NAD 7140 does that a bit, as did other older stuff I had (shrug).
I'm thinking about calling Stan Warren since he at least probably co-designed it to see what he thinks about simple mods or whatnot.
Why is there so little info on the ps audio 2c+ anyway?  There seems to be a big deal about their older pre-amps.  Maybe I should get one of those 
