The best replacement for dx4 is dx5.

The best alternatives to dx4 are rated as following:

Your alternative for dx4 is not listed? Suggest!

No companions for dx4 have been suggested so far.

You have in mind a companion for dx4 and it is not yet here? Propose!

Scale is based on the average worldwide traffic of dx4 in all years. Click on graph for more.

dx4

dx5

dx6