Seems you are a planar guy?
If so, Quad has done something I have never seen in Audio: they greatly improved their newest 2 models and cut the price by 50%! I am an almost lifetime Quad 57 guy. Never thought I would change. But my new Quad 2812X ($10K) runs circles around the 57s. Whilst retaining the Quad “magic” adding great detail and dynamics. They are not cheap but are probably the best $10K speaker made.
And for us planar guys, better than almost anything.
I like your preamp. And it is a good match with the Parasound but you can also greatly upgrade your amp with the Atma-Sphere Class D mono blocks. They are a terrific match with the 2812Xs and, as Ralph Karsten of Atma says, as good as his much pricier and highly regarded tube amps for only $5400.
Not cheap but sell your Maggies and Parasound. You don’t have to rob a bank.