I would look at the Hegel H80 Integrated...someone is selling one here for $950. It's 75wpc is capable of driving those ESL's (91db). The Hegel is very well reviewed. Also, someone is selling a Classe CA-100 $899 This is a stereo amplifier only it needs a preamp but for $899 its a great sounding stereo amplifier that will drive those ESL's np.
Matt M
Matt M