The 8500dv has firewire, and they're both slower than the AIW 8500. If you need firewire, maybe the 8500dv. Otherwise, the AIW 9000 uses the newer theater 200 chip and has the MMC 8.1 CD which is a free upgrade to MMC 8.5 w/DVD player and is a little cheaper than the 8500dv in Retail packaging, however the 8500dv can be obtained a bit cheaper refurbed, but uses a different VIVO cables than every other AIW card so its harder to find the cables.