Well, those Revelators aren't real efficient, so probably don't want to go too low in powering them.
Some AudioCircle folks have had excellent results doing the exact same thing that you want to do (3-ways with DEQX) using the USA-built ATI 6-channel amps:
ATI 1506: 6 X 150W/channel @ 8ohm
ATI 1806: 6 X 180W/channel @ 8ohm
ATI 2006: 6 X 200W/channel @ 8ohm
They're not inexpensive, but a good value. There is a used 2006 on AudiogoN for $1500, and a 1506 for $900 (that you can read about if you have the stamina to get through a 2000 word single paragraph).
The ATIs have their own transformer and capacitors for each channel. I don't think you are going to save $ by going with 2 X 3-channel or 3 X 2-channel amps.
Steve