I would have been fine if the 8GB internal memory thing was true. If I needed to expand beyond that, I'd buy a 32GB SD card since they're not super pricey. If I absolutely had to get a hard drive, I would have preferred a hard drive dock so I could avoid an external hard drive and the additional cords involved with that (mostly for cat-proofing purposes) but I'm not anti-external hard drive. I'm glad the option is there.
I've said this before: I will never buy a digital download if a retail release is an option. I mean, if I could get the download for free, download away! I simply prefer having the physical media. I've never bought DLC. I've been tempted but I either passed or got the Game of the Year edition which included the DLC. The only thing that may force me to need additional storage is if game patches get out of hand. I dislike patches for a number of reasons but if I need to download it, I will. I don't expect this to be problem though.