I had a pair of Forests when I was transitioning amplifiers, so I tried them with the MA6300, Cayin A88, and Plinius 8200.
My favorite of the 3 was the McIntosh because it had more life with the Forest than the Plinius. The A88t was weak in the low end, so it struggled through at higher volumes. If I had the forest again i would pair them with a powerful hybrid or do a tube pre with ss amp.
Bad news IMO, you need to up your budget, good news is you have a great speaker that will appreciate upgrades.
Good luck.