I still own the SC-V's as well as SC-VI's. I don't currently use any name-brand room correction aids. If you read through the Dunlavy Owners Manual or go to the "listening room" link at the Dunlavy site, John has some very good recommendations. You obviously like his speaker design, so why not try some of his suggestions for room treatments.
As far as cables go, you probably need to provide more info on your total system(including your room dimensions) if you want informed feedback. I myself use Dunlavy cables. I have discussed this choice with other Dunlavy owners, and we agree that the Dunlavy cables seem to work well with Dunlavy speakers, regardless of the electronics.
Hope this helps and happy listening.