The best replacement for hitachi is seagate.

The best alternatives to hitachi are rated as following:
★★★★★  seagate
★★★★★  dewalt
★★★★  makita
★★★★  western digital
★★  samsung
★★  seagate hard drive
★  toshiba
★  panasonic
★  panasonic plasma
★  wd
★  emc
★  milwaukee
★  seagate hdd
★  hgst
★  daikin
★  seagate hard drives
★  dewalt drill
★  o general ac
  porter cable
  paslode
  mitsubishi
  ryobi miter saw
  lg ac
  dewalt cordless drill
  sasuke
  netapp
  voltas
  bosch
  ryobi
  maxtor
  daikin ac
  makita drill
  wahl
  samsung fridge
  bluestar
  toshiba hard drives
  bostitch

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

Other search terms related to hitachi and their ratings are:
★★★★★ benq
★★ samsung drive
liteon
You have in mind a companion for hitachi and it is not yet here? Propose!



Google Trends

Scale is based on the average worldwide traffic of hitachi in all years. Click on graph for more.
hitachi
seagate
dewalt