What is difference(s) between your DVR-a08xl and DVR-108? They look (spec-wise) identical. Any differences as far as updating of firmware in future that might make the 108 somewhat obsolete? Finally, what minimum specs of computer are necessary for the new burners? I have a single-layer DVD burner now that works great with my Dell 1.5 Pentium and 768Mb RAM. Finally, what is the OEM version and is there any difference? Thanks.