Hello wemfan,
I'm glad you got it up and running. I think any improvements in sound quality, by using a separate expensive AV preamp/processor, would be highly unlikely no matter which exact unit you used and how much it costs. Even if there were improvements, they'd probably be marginal improvements that are not worth the extra cost, cabling and complexity. I believe adding a good quality sub would provide a much more obvious improvement in sound performance and enjoyment. The Oppo 105D will outperform the majority of AV receivers and preamp/processors available and it's also a much simpler and more elegant solution for your needs.
I've never tried what auxinput described, but you could always give it a try and see if you like the sound better with his configuration suggestion.
Tim
I'm glad you got it up and running. I think any improvements in sound quality, by using a separate expensive AV preamp/processor, would be highly unlikely no matter which exact unit you used and how much it costs. Even if there were improvements, they'd probably be marginal improvements that are not worth the extra cost, cabling and complexity. I believe adding a good quality sub would provide a much more obvious improvement in sound performance and enjoyment. The Oppo 105D will outperform the majority of AV receivers and preamp/processors available and it's also a much simpler and more elegant solution for your needs.
I've never tried what auxinput described, but you could always give it a try and see if you like the sound better with his configuration suggestion.
Tim