If you haven't bought the Model 50 yet (and it's quite a beauty), I'd also consider going multichannel AVR. You'd lose the phono stage, but you'd be future proofing your setup with 4K/8K HDMI switching, eARC, Hi-Res DAC, bass management, room correction algorithms, and perhaps streaming playback.
While there could be an audible difference in stereo playback between an integrated amp and AVR, I'd be hard pressed to notice a difference.
Integrated amps were a minimalist solution to pre-amp and amplifier separates; receivers and later AVR's became even more minimalist by going all in, all out, as an all-in-one wonder. The best way to lighten up is to find these heavy hitters.
