upgrade to the original birdland

Well a NON OS DAC maybe the ticket. I know you were complaining about the female singers in another thread being zippy. Do you have anything else you could hook up to the integrated to understand what's going on? Is your Toshiba just a digital transport or does it have analog outputs? If it does try it without the Dac. If it's still zippy it's not a Dac problem.

Yes it does, I'll try that.

Still zingy at fairly high volumes.

Houston we have a problem! Only two components left speakers or integrated.You might be over driving the speakers, the integrated or both. Most 1st order crossover speakers cannot be driven as you would a higher order design. The tweeter will try to pass frequencies from the midrange driver. You may need to try a different pair of speakers.Something designed for higher SPL.

I was thinking that the odyssey lorelei's would be a good choice, or maybe a monitor with outstanding bass.