Amp/Preamps vs. High end AV Receivers

Thanks for the inputs caphill

Any feedback regarding  Integra DHC-60.7 Preamp?

I strongly suggest you check out a Classe Sigma SSP Pre/Pro.  It was designed on B&W speakers when Classe was part of the B&W family.  Classe was shut down but I understand it is back up and running.   Balanced for L/R channels, single ended for rest to economize.  It partners great with a Classe Amp 5 (2 balanced or SE, 3 SE channels) for very good sound.  You should be able to get both for close to $5K used. You will likely want to upgrade your primary amp in the future but then you will have a really great 7.1 setup if you want.  There are a few of each of these currently available on Audiogon.  If you want to really round out the system, add an Aurender N100H!  Enjoy!  

@terrancej 

I wouldn't recommend the Integra DHC 60.7 processor. It wouldn't make a difference from the preamp processor section of your Onkyo receiver. 

The Classe Sigma SSP preamp processor and the Classe Sigma Amp5 five-channel amp that was recommended by psnyder149 above are great but they will cost around $6k used altogether in used markets. However, the Classe Sigma Amp5 is a class D amplifier, which is very good for HT but not so for music IMO. But the Classe Sigma SSP preamp processor is excellent and is optimized for stereo. It originally retails for $6k for the Sigma SSP Mk2 and $5k for the first early version of the Sigma SSP. 
The Classe Sigma Amp5 five-channel amp retails for $5k new. 
If you can afford this Classe Sigma combo it would be great and will be big step up sonically from your Onkyo AV receiver. 

In my opinion one cant compare an AV receiver to separate components.The detail with HQ separate components is in a class of its own.However there are some HQ av's.Problem is most have hdmi decoders with the audio logic control.
DD, DTS...I see many every month with blown hdmi, cant be repaired and no spares available a day after warranty expires...RIP A/V!Rather purchase an arxam/cambridge/rotel...and use HQ add on's.Separate components are easy to work on and most can be repaired for life.