I was thinking of doing 2 12 H2s in a Saturn.. Those go at 2000RMS each sub so your undercutting it by alot.. The H2s do hit hard but the sound quality isnt the greatest. The subs below this are good sq!!!!! and they hit. I heard 2 yesterday in an SUV and it sounded nice on a 1200 rms cerwin vega amp.
If I were you go with the Hifonics Colossus 3200 @ 2 ohm or the Soundstream PCA 3500 which are both affordable and put out the power that the H2s need. The prices for those amps are 600-800 and even if they are slightly overrated you are still getting more power than the orion amp for a much lower price..
Soundstream was sold out but the are still the same company.. The company now running it is doing exactly the same production as original.. It's just a different owner, like if you were to sell your car... People on here always assume because hands are switched that different things are going on!! There is no reason for such panic in some cases if you do your homework right.