There’s a McCormack DNA-225 and a Bryston BP-6 available here that’d come in well below $4k for both. Back in the day McCormack and Thiel showed together frequently, and I used a BP-6 with a DNA-0.5 (Rev A) with CS1.6es and it was an excellent match. The 0.5 provided the juice and some heft and both allowed the Thiels to throw an awesome 3D soundstage the speakers are capable of. I know they’re not an integrated, but I felt remiss not at least bringing this combo up given my experience. You also have the future option of sending the DNA-225 to SMcAudio for their renown upgrades and go to another level entirely. Anyway, just another option to consider, and best of luck.
Best Integrated Amp for Thiel CS 2.4 Speakers
I bought a pair of speakers 15 years ago and the Accurus DIA 100 amp I had started popping (and wasn't that great anyway). I put the whole thing in storage. Now I want to buy a new (or demo) integrated amp. I am not opposed to pre-amp but that makes it that much more challenging. I am willing to spend about $4K plus cables. I listen to the usual - 70's rock, lots of instrumental, trip hop. I do need solid low bass. I barely used the speakers, I don't want to sell them. Any suggestions? Thanks.