Best amp for Thiel 3.6 speakers?

Using ML 333 with mine. It sounds a bit laid back, I think this is due to the ML amp. Otherwise, very detailed, good soundstage, and well-controled bass. Very revealing of any weakness of front end equipment and bad recordings. I am running a pair of Transparent Ultras speaker cable. The rest of the system consists of ARC LS 2B MkII pre + PH3 SE for phono; ML #37 (transport) + Genesis Digital Lens + SFD2 MkII (D/A) for digital; Michell Orbe SE + SME V + Benz M2 (woodbody) for analog. MIT balanced interconnects, Illuminati digital cables, Eletra Glide powercords + PS P300. I am using NOS tubes and different cones/vibation devices to fine tune the sound. I've also had my Pass Aleph Os running the 3.6s for a little while. Not enough power, but great with small ensembles at low volume. It's in my bedroom powering my second system now.