What’s the power output of your Onkyo? The manual says your speakers are pretty efficient at 90dB and “compatible with an 8Ohm tap” for whatever that’s worth. Unless you’re a total headbanger with bass-heavy music I’d think 100Wpc should be sufficient, but it really depends on your sound preferences. If you’re looking for a clear, neutral sound there’s an Anthem MRX520 for $700 on US AudioMart I’d hop on ASAP if it has the features you need. If you want more power there’s also an MRX720 for $1700 on eBay. If you don’t want to buy used their new models will cost around $1000 more, but you could also consider a Yamaha RX-A1080 from Accessories4less.com for $1000 when one comes available. I compared all the major brands when I worked at Magnolia and the Yammys were the best by a good amount for 2-channel performance and also happen to be one of the most reliable makes (along with Anthem). If you’re looking for a warmer, fuller sound then look no further than Marantz.
If you don’t absolutely need an AVR you’ll get much better sound from a stereo integrated amp that you could integrate with any AVR that has preouts if you need that added functionality. Hope this helps, and best of luck.
If you don’t absolutely need an AVR you’ll get much better sound from a stereo integrated amp that you could integrate with any AVR that has preouts if you need that added functionality. Hope this helps, and best of luck.