I have owned a Yamaha RX-V995, RX-V3000, RX-V3300, and an RX-V2400. I now have a Marantz AV-7701. I still have the Yamaha 2400 and use it as a pre-pro for a Yamaha MX-70, which pushes a pair of Chorus Is. My Marantz pre-pro is hooked up to Aragon 200 watt amps, which power Klipsch RF-7s. I liked all my Yamaha receivers a lot. The 2400 used to control my Aragon amps with the RF-7s. However, I feel it was clearly a step up when I switched to the Marantz. Comparing the Marantz to the RX-V2400 is not an equal comparison for technological reasons as well as price. However, I am enthralled by my Marantz and am certain that when I switch to a new pre-pro (probably many years from now), I will stay with Marantz. I agree about the benefits from Audyssey; I do not have the best version, yet cannot fathom how it could sound any better. If the Marantz receivers are as solid and advanced as their preamp/processors, I would go with Marantz. I also like the looks better than the new style Yamahas.