Big_Al ... As far as I can tell, you can upgrade the 21.5 inch iMac to 16 GB of RAM, Apple just doesn't sell it that way. As for the video card, it is just how it is done. You gotta get this to get that. You can't get the SSD on the 21.5. I can't slam Apple on this, everyone plays these games. Dell is really awful. If you look at the specs for the iMac, you will notice both have 4 RAM slots, and use the same type of memory. Adding memory yourself on an iMac is WAY easy, BTW.