After my room construction is finished, I will be purchasing the DHC-80.3 and the DTA-70.1. My friend out West has the DHC-80.3 and the DTA 70.1 and he's now testing the Denon DBT-1713UD and the Integra DBS-50.3. He's an audio professional and runs very heavy DVD noise filtering tests through his players to decide what's good and bad. He has already tested the Oppo BDP-103 which had very bad handshaking results and the noise filtering on DVD's were very bad.
He said that he was very impressed with the DTA-70.1 amp. It is very clean sounding. He compared it against many of his $6,000+ amps and is very impressed with it.
His DHC-80.3 was very easy to setup and the new MultiEQ XT 32 made a tremendous difference compared to the older Audyssey versions. He found that calibrating 6 positions sounded better than 8 positions. The parametric calibrations for the sub I think is a 10k filter and does an incredible job. The default Low Pass Filter setting on the DHC-80.3 is 120hz and shoud be left there for a more fuller and detailed subwoofer sound.
He told me; when I get my system installed, I should run the Audyssey XT 32 with 6 positions, change the crossover frequencies to 80hz, make sure all the speakers are set to small and don't forget to set your Dynamic EQ setting to on. Also, disable all the THX settings. There useless cause not all material uses THX standards and it will degrade a lot of your material.
The video processing in the DHC is very good but you should set your DHC to 'THROUGH' and just let you high end DHC processor do all the audio and either the Blu Ray or DVD or Universal Player that you own; if it's the latest on the market and has the latest firmware updates, do all the video processing. If you don't use the 'TRHOUGH' setting, it won't hurt anything but may slowdown the disc loading and video performance. So experiment, it can't hurt and won't disturb your audio calibration.
But I highly do recommend you borrow or purchase a Sound Pressure Meter to configure your subwoofer to your room. It will make a world of difference. The Audyssey does a pretty good job but it's not 100 percent perfect. If you want to use a SPM, set the meter at your main listening position (ear level) with a tripod, with the mic facing the ceiling. Set it to (C), Slow and 75db and run the test tone that's built into the DHC, choose the subwoofer and raise the volume until the SPM reaches 75db. Then run your Audyssey calibration software for the number of positions needed. Usually 6 but depending on room size and other stuff in your room that may absorb or deflect sound frequencies, 6 should be sufficient. But hey, everyone's room is different and it doesn't hurt to experiment. But on the DHC, you can only configure up to 8 positions unless you use the professional calibration kit that will allow you to calibrate up to 32 positions. But the professional kit and the built in MultiEQ XT 32 are identical according to the Audyssey represenative I talk to on a regular basis. The only difference is that you can calibrate up to 32 positions with the kit and print out a before and after graphical evaluation of your rooms sound measurements and determine which setup produces the best sound.
There are so many approaches to achieve good room sound. There are simple ways that produce great sound and there are also complex ways to achieve great sound. Which ever works for you is pretty much up to you.
But so far, the simplest way has been working out good with many people who own this pre-amp and amp.
And Integra/Onkyo has excellent support as I pick their brains a lot to. I learn from asking just like you. And AVS has helped me out too.
I hope I was able to steer you in the right direction. I wish you luck with your system configuration and if you need more help with your DHC, let me know and I'll direct you to someone who can help you out a lot or call Integra, they have a toll free number and will help you with your questions.
Peace out and have a fantastic new year.