in flight intertainment systems

We are building an RV-10 and was looking at installing an auto-based
intertainment system from J.C. Whitney. An entire system with DVD, CD,
and MP3 player and 2 monitors ( one up frount and one for rear seats )
can be had for well under 1000.00 while the aviation calliber system
cost nearly 10,000.00. We intentionaly left out the am/fm and TV tuner
as I understand these have the most probability of interfering with the
other avionics??? Hope someone can shed some light on this endever for
us.