The best replacement for canon 5d is 7d.

The best alternatives to canon 5d are rated as following:
★★★★★  7d
★★★  nikon d700
★★★  40d
★★  nikon d300
★★  canon 7d
★★  nikon d200
★  nikon d7000
★  30d
★  nikon d800
★  canon 40d
★  1ds
★  nikon d3
  blackmagic
  nikon d2x
  canon 30d
  d700
  t1i
  canon 1ds
  canon 5d mark ii
  d200
  mark ii

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Speaking about canon 5d, one probably shouldn't forget about nanoflash.

Other search terms related to canon 5d and their ratings are:
★★★★★ nanoflash
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