I am using a Marantz 1060 as a preamp and a Niles 2100 (2 channel) power amplifier to power 2 Elac DBR-62 speakers (100w 8 ohms). I'm adding 2 more Elac speakers and running them into my kitchen which is adjacent to the den where the Marantz/Niles are located. The Niles 2 channel power amp will have to be replaced. I've been informed that the Parazound ZoneMaster 4 - 4 channel amplifier is a great option for this but they are out of stock everywhere that I've looked. Can anyone offer any alternatives? I'm more than happy to get an older power amp that can do the job for a reduced price.