Dont worry, just get active adapters.
I am myself using 1xDP -> HDMI adapter from XFX (Eyefinity Verified)
tho I am using 3x Eyefinity it does work. don't know how many adapters you need for 6 Screens tho. =) but the Active Adapter DOES work.
Make sure they are "Active Adapter" and to be on the safe-side get Eyefinity Verified Adapters. Both Sapphire & XFX has such adapters.
Running AMD Phenom II 965 @ 3.8ghz with 16GB DDR3 1333mhz RAM
Sapphire AMD Radeon HD 6870 1GB Default Clocks
Sapphire AMD Radeon HD 6850 1GB Default Clocks
Eyefinity Setup @ 23" LG Screens. with 5.1 Onkyo AVX 390 Receiver