What would be a good amp for 3 orions?

[BigB]

I have three orion hp12D2`s in a ported elnclosure. Originally I was gonna run an hccad5000amp 2500 at 1 ohm so about 833 watts a sub at 1.34 ohms.

I was either thinking power acoustik gothic series 5500 and wire that to 1.34 ohms

Do you guys have any ideas the subs are 500rms 1000 peak???