Try playback from memory. It really improves my system. Also I play everything back at 96/24.
My dac has digital room correction and upsamples to 96/24 to input into a Lyngdorf Room Perfect processor. I think this is why mine sounds better using Pure Music to upsample 44.1/16 to 96/24. The software is better than the built in hardware upsampler.
My system sounds awesome using PM. The biggest sonic change from iTunes is Less is More. When playing back in Less is More the sound quality is upped another notch.
I had switched to A+ a few years back. The 2.04 PM sounds better in my system. Even without Less is More. With LIS it is not even close.