What Class D amps will drive a 2 ohm load

Thosb,
      I think you mean Tom Thiel, Jim passed quite a few years ago and Tom is active on the forums with many insights into getting the most out of the great Thiel designs. I have enjoyed this discussion also.

George

I believe PS Audio Stellar M700 monoblocks
are rated to be stable down to 2 ohms.

Into the OP’s speakers this statement means nothing, unless they can back it up with, "this amp can also almost double it’s wattage for each halving of impedance down to 2ohms".
  
You can put a 2ohm load on an 1980’s Nad 3020 integrated and it will remain stable and not oscillate or blow up also. But will it drive to OP Thiel CS5’s? NO!!!! It will make a noise out of them. Will it get the best out of them? "NO WAY IN THE WORLD!" 

Cheers George

Here’s a new model that claims it can handle 2 ohms.

This amp goes backwards in to 2ohms!!, like I said above with the NAD reference

Spec sheet for Icepower 700ASC specifies 2.5ohms minimum.

Same deal with this, what it’s true 8ohm, 4ohm, 2ohm "wattage figures"? do it "increase significantly" (almost double) as the impedance goes down.
This indicates an amp that will drive effortlessly the OP’s kind of speaker to it’s full potential.

Cheers George