The best replacement for 478 is lga775.

The best alternatives to 478 are rated as following:
★★★★★  lga775
★★★★★  socket 775
★★★  478b
★★★  775 socket
★★★  775
★★  479
★★  754
★★  758
★★  462
★  939
★  lga 775
★  socket p
★  358
★  socket t
★  socket m
  socket 754
  socket a
  intel 775
  socket 479
  socket 462
  lga
  l-758
  423
  p4 775
  amd 939

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Speaking about 478, one probably shouldn't forget about pci express.

Other search terms related to 478 and their ratings are:
★★★★★ pci express
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478
lga775
socket 775