I"ve taken a look at the Behringer amps - you are correct - the ones I looked at can handle 4 ohms bridged with no problem.
If I were to order an EP1500 - it will do 900 watts bridged into 8 ohms which would be perferct for getting the driver with dual 4 ohm coils wired in series.  Driver is rated for 1000 watts so that seems really reasonable to me.
Or...  I could order the driver with the 2 ohm voice coils and have a 4 ohm load - into which the EP1500 would deliver 1400 watts.  This is a bit beyond the drivers max power rating - but I wonder if that is actually a bad thing..  as long as it is not contantly abused.  I would think the driver could with stand an occasional peak of 1400 watts..    This Behringer EP1500 can be had for about $190 new online.  Really reasonable.  Any drawbacks to that  unit vs. the EP2000 or EP2500 like you have?
Bandit.