The Cable Company (thecableco.com) has a cable lending library, but generally only has speaker cable lengths of 8-10ft.
In my experience, DSP room correction is useful for tweaking speaker response to compensate for minor room issues, but only after doing everything possible to adjust the room acoustics with speaker and listener positioning and acoustic treatments.
You didn't mention your room layout or what treatments you've already installed, but the room if probably the most important component in your system. Getting the room right can make a huge impact on the overall sound quality.
Some of the companies that specialize in room treatments will provide free consulting to help you figure out what will have the most bang for the buck. Take a look at GIK Acoustics.
In my experience, DSP room correction is useful for tweaking speaker response to compensate for minor room issues, but only after doing everything possible to adjust the room acoustics with speaker and listener positioning and acoustic treatments.
You didn't mention your room layout or what treatments you've already installed, but the room if probably the most important component in your system. Getting the room right can make a huge impact on the overall sound quality.
Some of the companies that specialize in room treatments will provide free consulting to help you figure out what will have the most bang for the buck. Take a look at GIK Acoustics.