64gb will fill up with shader cache. But if you don't mind upgrading the SSD yourself, it's always an option down the road and is considerably cheaper than buying the higher end Decks. e.g. a 256gb 2230 m.2 is ~$20 where the 256gb model Deck is $100 more. Also, you can get 1tb and 2tb 2230 drives, which aren't an option for a factory configuration.
