I've done some follow-up on this and it looks like my amplification equipment (Marantz reference series) integrated amplifier is likely to be just barely at or below the minimum power range for the Thiel speakers, despite its being considered a "high current" amplifier. Rating of 100 watts into 4 ohm load. The Marantz can be "bridged" with by purchasing another Marantz amp for 200 watts mono thus adding still additional cost to go with the Thiel speakers. Thanks for the prior follow up! The question now to consider is the gain in the performance with the Thiel worth the additional cost of the speakers plus a second amplifier or replacing the amplifier entirely with another.
This possibility opens up even more choices.
This possibility opens up even more choices.