Power line noise with my new integrated

Hi everyone,

Just added a Belles Soloist 1 integrated to my system.  It sounds fantastic, but it's picking up a lot of power line noise.  I have had many different integrated amps and the worst noise I've ever had is just a small static pop when the A/C kicks on.  Usually, there's no noise at all.  However, with the Belles I'm getting much more power line noise: a buzz every few seconds when the stove is on, a pop when the bathroom fan is switched on, a loud pop with the A/C or heat, and some other random interference.  

I get the same interference with or without a power conditioner (Furman).  I live in an apartment, so a dedicated lines is not possible.  Is it time to try something like a PS Audio Power Plant?  I hate to spend that kind of money just to find out it doesn't make a difference.  Or perhaps there's something that can be done with the Belles to make it less prone to noise?  

Any thought would be welcome.

Thanks, Scott