Looking to upgrade Bryston B60. Considering Atoll among others.

Hello,

I am looking to upgrade my amp which is a Bryston B60 integrated.  I have a bigger space now and want some more power / headroom.  My speakers are Thiel CS 1.6s which are power hungry (so I have read).  I mainly stream Tidal using a Cambridge Audio CXN V2 STREAMER.  I am considering a bigger Bryston like an used 3B or 4B with say a BP17 preamp or maybe a B135.  I love the clarity and punch from my B60.  The Thiel's are quite detailed so a touch more warmth wouldn't hurt. I wanted to ask about Atoll.  I recently went the AXPONA and I heard an Atoll SDA300 into Atohm Sirocco 2.24's.  I wasn't familiar with Atohm but had heard of Atoll.  Wow, really sounded impressive. Big, detailed, punchy. The SDA is 260 watts in to 4 ohms I believe and I could really feel the power and headroom. So I thought about an Atoll IN300 evo as an option.  Would love to get opinions on how that might sound with my Thiel's?
I am also open to other amp brand suggestions. Some other brands I was thinking about - Accuphase, Hegel, Simm Audio, Cambridge, Arcam.  My price ceiling is around $4k, possibly $5k.  thanks!