For arcade games, I'll always go to MAME as kiwilove mentioned. In the 80s and even 90s, all console versions of great arcade games were cut down sacrificing audio, visuals, options, and speed (to name a few). Unless I have real nostalgia for arcade ports from playing them as a kid, I go with MAME all the way. I have a bare bones old Neo Geo cab, a tank stick, and an old desk top inside that does the trick for me. That said, the 5200 is my favorite Atari system. The analog controllers make it unique and the trak ball is awesome. Even if they are not arcade perfect, Robotron and Space Dungeon on the coupler with two working analog sticks is a unique gaming experience. Much like the Intelllivision, I enjoy the system games over the arcade ports. Gremlins, Pitfall II, and Rescue on Fractalus are outstanding. Additionally, I just got a MyIDE II from Atarimax to expand my experience on the XEGS since I unfortunately never had a computer growing up until an IBM back in 1993. I look forward to playing the outstanding 8-bit library, but I feel I'll never tire of the unique experience of the 5200. So unless you're severely running out of space or need money, I don't see why anyone would sell their 5200.