Looking for advise

depends on your budget, check out the PS Audio products like the Ultimate Outlets and there interconnects and power director. Happy Listening!

I would not try to complete you task all at once with your budget so what I would do is purchase two Ultimate Outlets used here on AGON and this will set you back around $500 or so. I would use one for the dennon avr and one for the dennon dvd. When the budget allows, I would work on a few interconnects as you can pick up a few pairs in the $150 - $200 price range
1. Two U/O = $500
2. Two pairs inteconnects = $400
3. Two power cords for U/O = $200 - $400 approx.
4. Power Plant P-600 used for $1300
Do this in steps as it's better on the wallet! These are great upgrades to do as U/O work great, I have five of them along with a power plant P-600 and have not heard anything that compares with the PS products.
Don't waste your money on the monster products as they will do very little for your system! Happy Listening!

You may want to pick up a few used Lab power cords as you can get then for around $175-$225 for each here on agon. Happy tuning