amp recommendations for my recently purchased sundown subs?

[xander37 10+ year member]

I've just recently purchased 2 subs which can be viewed here

http://www.amazon.com/SA-12-D2-Sundown-Audio-Subwoofer/dp/B003ZW80TS/ref=cm_cr_pr_product_top

I'd like some recommendations on what amp would most efficiently push these, I've heard that their rms ratings are underrated and are more likely 1000 rms rather than 600. I'm not very tech savvy and was hoping there would be some people out there who knew an amp that would match accordingly with all the technical aspects involved.

My budget is $350.

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