I am an investor and I know other investors.
I wouldn't invest in anything that uses CDs/DVDs/BlueRays... these are sone ninetish... I don't know anybody that uses that obsolete media... terabyte sized HDs&network wins. Please no bulky and limited sized CDs/DVDs/BlueRays... I prefer to use a small Raspberry Pi as media center. If I was interested in CDs/DVDs/BlueRays I would connect it through USB. I don't plan to buy a blueray reader/burner ever anyway. I prefer hard disks. Even better, I prefer to quickly download stuff from everywhere I am rather than searching my entire collection (oh it was scratched by a friend, oh my friend didn't gave it back to me, oh where did I stored it... in my parent's house or in my gf's house).
Please, do not make a CD/DVD/BlueRay player. No one uses that in this millenium. Do you think that Raspberry would sell better with a DVD attached? Even if it costed the same? I don't want a DVD burner even if you gave it to me free and you paid shipping.
Some kind of raspberry pi like miggy could be more interesting? Give it USB and and a PCI-E bus male connector. You want expansion and various cards? you connect the board to a PCI-Express busboard (or pc) or feed it with power from it. Give it a GPIO pins, some USB ports and HDMI/audio out. Include a mini-SDXC connector to make it boot. You can buy an ethernet-usb card for around 6Euros. WiFi usb cards are cheap too (12€?). If you want stuff like SATA, Gigabit Ethernet, Advanced soundcards you could access PCIe bus. You could even draw the final gfx on the host's gfx card memory
