Have you tried the entry level Transparent cabling that won Product of the Year award in TAS. I would also call the Cable Company and describe your system and give them a budget to work with. They maintain a database of customer comments that track what other people with similar equipment have found to be synergistic. So they can make a bunch of recommendations for you and then provide you with loaners for home evaluation. You can then decide what works best for you.
http://www.thecableco.com/
http://www.thecableco.com/