I've owned two Integra receivers. The 1st was a DTR 7.1 that was replaced by Onkyo/Integra for a DTR 7.4 (the current model) due to machanical failure.
When I bought the 7.1, Integra and my dealer were boasting about upgraded components (capacitors, resistors, circuit boards, and power supply). This suppose to equated to better sound. I confirmed that the 7.1 did use different components than the comparable Onkyo unit. They clearly used "Fine Gold" products as called out in their literature. Did this equal better sound?? My ears said yes, but possibly that's because I owned the Integra. I believe that the only true test is double blind, which I never conducted.
When Onkyo/Integra replaced my failing 7.1 with the current 7.4, I wondered if it would be better than the current crop of Onkyo receivers, and did they still use the upgraded "Fine Gold" components. The answer is NO! The "Fine Gold stuff is no longer present in the Integra line up. When asking my dealer about this, he stated that Integra had changed and no longer offered the upgraded quality components, over what Onkyo uses. For this very reason he stopped carring thier product line.
So for what it's worth, I believe you'll get a longer (3 year) warranty with Integra. But let me preference this by saying that it took 4 months of HELL and many trips to the repare shop before they agreed to replace my failing unit.
With that said I'd save my money, and by an Onkyo product over the higher priced Integra product anyday. However, because of the grief I experienced, I will NEVER by another Onkyo or Integra product again! I believe there are more customer oriented companies out there.
If I were you, I'd look at the comperable products from Yamaha, Denon, Harman Kardon, or Pioneer.
Good Luck!