1. Atari 2600
-The system pretty much brought us video games. It made tons of innovations and great games, classics among classics are on this system. It also nearly destroyed the market as well, which is still pretty impressive.

2. Atari 5200
-Though it's controllers are garbage it did provide some really great games like "Pac-Man", "Joust", "Star Wars: The Arcade Game", "Centipede" and "Defender".

3. Colecovison
-The most powerful console of it's time gave us some sweet games. "Donkey Kong", "Zaxxon" and "Mr. Do" are the three easiest reason to buy a Colecovision. It also had a really nice design.

4. Intellevision
-I can't stand the weird controllers but i'll deal with it to play a system that made Atari worried about failure in the market. Good games include: "Snafu", "Frog Bog", and "Tron: Deadly Discs".

5-9 everyone else
-I haven't played these systems so I can't debate on which is better than the other.