The best replacement for sony alpha is canon rebel.

The best alternatives to sony alpha are rated as following:
★★★★★  canon rebel
★★★  canon eos
★★  canon xti
  rebel xti

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Speaking about sony alpha, one probably shouldn't forget about minolta lenses.

Other search terms related to sony alpha and their ratings are:
★★★★★ minolta lenses
★★ minolta lens
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sony alpha
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