claud,
I've tried lots of amps with my TSM-MM's; and while amps with lower damping factors (mostly tubed) sound better with them- it's not always the case. Some (emphasize: some) high damping amps will make the Merlins sound 'thin'. Some will not, however.
(lot's of factors contribute to how an amp will sound with a given speaker)
Look forward to your report!
WEEZ