I recently added two 400s to my Atari collection. They were local buys of opportunity, and I got both really cheap, the second better than the first.
I keep looking at 800s, but I have to wonder besides simply owning one, if I have any need or would see any benefit from adding an 800.
I already have a 400, 600XL, 800XL and an XEGS.
So with the 400 I can play games like Atlantis and Demon Attack that won't work on the XL computers (if I can ever get them). For games that need more memory, like Lode Runner, I have the 800XL and the XEGS. The 600XL was a sentimental buy because it was my first computer, so I grabbed it a year ago when the opportunity arose.
So is there anything I can do with an 800 I can't do with my current systems?
P.S. Adding memory to the 400 is beyond my ability.