@nyev
I’m also shopping in the $20-30k range.
The Magico A5 is a bargain at it’s price point. It surpasses the S3 and completes with the S5mk2. It’s midrange is fantastic.
Magico generally are neutral transparent speakers so should be a relatively clear window into the rest of your audio chain. It may be an ideal subjective match for your Gryphon Diablo- only you can tell what you like. The A5 is my top choice so far, but my dealer wants me to demo Rockports and Vimbergs first.
I’ve auditioned the Monitor Audio PL300 II several times- it’s sounds great at it’s price point, but was not in the same sonic and price point as the A5. The PL500II are too large/tall for my tastes and space. The Monitor Audio line offers great price/performance from the Silver and up.
I never warmed up to the Wilsons or B&W sound. But it’s likely a matter of personal taste.
It’s best to demo speakers in your own system. If not possible, then demo it with your Diablo. Otherwise, you’ll be hoping and guessing what sound “you” like based on data of what “others” like which may or not align with your own subjective tastes.