The best replacement for e6400 is e6600.

The best alternatives to e6400 are rated as following:
★★★★★  e6600
★★★★  e4300
★★★  e6410
★★★  e6500
★★  e6700
★★  e6420
★★  e6430
★  e6300
★  d630
★  e5200
★  e4500
★  e5400
  t400
  x2 5200
  4600
  x2 4200

Your alternative for e6400 is not listed? Suggest!
Speaking about e6400, one probably shouldn't forget about viiv technology.

Other search terms related to e6400 and their ratings are:
★★★★★ viiv technology
You have in mind a companion for e6400 and it is not yet here? Propose!



Google Trends

Scale is based on the average worldwide traffic of e6400 in all years. Click on graph for more.
e6400
e6600
e4300