dual 2 ohm means you can have a 1ohm or 4 ohm load PER sub. you cannot have a 2 ohm load per sub. so, if im not mistakn, the orion and kicker amps above will not work, because they are only 1 ohm stable (i think, dont quote me on this). if thats the case, then you'd have to wire the subs to the amp at a 2 ohm load which would be a waste of power.
Therefore,
get an old school orion HCCA thats 1/2ohm stable.