The best replacement for atari is intellivision.

The best alternatives to atari are rated as following:
★★★★★  intellivision
★★★★★  nintendo
★★★★  nes
★★★★  commodore
★★★  colecovision
★★  sega
★★  amiga
★  activision
★  coleco
★  hasbro
★  magnavox
★  commodore 64
  turbine
  tommo

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Speaking about atari, one probably shouldn't forget about 75 games.

Other search terms related to atari and their ratings are:
★★★★★ 75 games
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atari
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