The best replacement for sb400 is sb600.

The best alternatives to sb400 are rated as following:
★★★★★  sb600
★★★  sb700
★  sb 700
★  270ex
★  sunpak rd2000
★  sb 600
  sb 300

Your alternative for sb400 is not listed? Suggest!
Speaking about sb400, one probably shouldn't forget about d50.

Other search terms related to sb400 and their ratings are:
★★★★★ d50
★★★ nikon d60
You have in mind a companion for sb400 and it is not yet here? Propose!



Google Trends

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sb400
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