I like the CS 1.6 recommendation as well since you've obviously fallen for the Thiel sound already. They may be more sensitive than the 1.5s, but you might want to check the impedance curve since they may also appreciate some juice. I like the Concident recommendation as well, but the Meadowlarks I'd be a little hesitant unless there's a good supply of replacement drivers out there.
Some other brands I've heard that image very well and are probably easier loads are Joseph Audio and Silverline. Something from Verity Audio or Reference 3a might be worth a look too, although I don't have as much direct experience with those.
Lastly, you might consider contacting Pass to see which speakers they would recommend for your tastes -- they're supposed to have very good customer support. Best of luck.
Some other brands I've heard that image very well and are probably easier loads are Joseph Audio and Silverline. Something from Verity Audio or Reference 3a might be worth a look too, although I don't have as much direct experience with those.
Lastly, you might consider contacting Pass to see which speakers they would recommend for your tastes -- they're supposed to have very good customer support. Best of luck.