The best replacement for dobsonian is reflector.

The best alternatives to dobsonian are rated as following:
★★★★★  reflector
★★★★★  equatorial
★★★★★  newtonian
★★★★★  cassegrain
★★★★★  refractor
★★★  sct
★★★  newtonian telescope
★★  schmidt cassegrain
★★  reflector telescope
★★  catadioptric
★  equatorial mount
★  maksutov-cassegrain
★  newtonian telescopes
★  newtonian reflector
★  schmidt cassegrain telescopes
  refractor telescopes
  schmidt
  celestron
  reflector telescopes
  altazimuth
  refractor telescope
  orion

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Speaking about dobsonian, one probably shouldn't forget about astrophotography.

Other search terms related to dobsonian and their ratings are:
★★★★★ astrophotography
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Google Trends

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dobsonian
reflector
equatorial