Replace amp or speakers ?

I would think that Rowland amps are in another league based on rep, but have not heard either.

Change the amp first.

I would vote for the amp, for several reasons. I'm not impressed with that amp. Plus I think you will experience greater improvement in your system by upgrading closer to the source. I checked out your system, and think replacing the PS Audio would give the biggest bang for the buck.

Let us know what you decided to do after all.

Rowland, then you will ask yourself (What IF I were to go to Virgo's?) Hook line and sinker! Have fun.