Ideas on amp for Thiel

I recommend taking a look thru' the "Thiel owners thread". There are many suggestions for amps, including some posts by Tom Thiel. The short of it is don't skimp on power (Thiel recommended at least 100+ W for most models and Tom Thiel prefers much more than that), make sure the amp has a 4, if not 2, Ohm rating, and get high-quality (ARC, Ayre, Classe', Pass, et al.) because the Thiel's resolution will reveal faults in your amps and sources.

I have been using a Parasound JC1

I've not heard it but it's said to be a good one. Hard to go wrong with a John Curl design. Sometimes, though, we audiophiles get itching for something new and different, closer to our own idea of musical perfection. Good luck and have fun!