Valor RM-1218C 12.1" Flip Down All-in-One Car Video Monitor w/DVD/USB/SD+Remote
So just got one of these (refurbished) and installed in my 2011 Sienna.  I chose Valor because of the USB access and the good reviews of the smaller unit on Amazon.  I'm pleasantly surprised on how well it works.  I had contacted Valor support in regards to the USB functionality and they told me it could play AVI and other media files, but could only handle a 2gb capacity flash drive.  Kinda a bummer because I wanted to fit more movies.  Low and behold I plugged in a 16gb flash drive and it worked flawlessl